ClassicLunatic.com - USTC Supply Snapshots

Date / Time	Circulating Supply	Difference	Total Supply	Difference	Comm. Pool	USD per coin	Block
Nov 9, 2022, 14:19	9,807,726,094	-1	9,807,726,094	-1	231,250	$0.024981	10,173,027
Nov 9, 2022, 14:18	9,807,726,095	-6,126	9,807,726,095	-6,126	231,247	$0.024948	10,173,017
Nov 9, 2022, 14:17	9,807,732,221	-60	9,807,732,221	-60	231,243	$0.024981	10,173,009
Nov 9, 2022, 14:16	9,807,732,281	-23	9,807,732,281	-23	231,242	$0.025025	10,172,999
Nov 9, 2022, 14:15	9,807,732,304		9,807,732,304		231,239	$0.025125	10,172,991
Nov 9, 2022, 14:14	9,807,732,304	-4	9,807,732,304	-3	231,237	$0.025155	10,172,981
Nov 9, 2022, 14:13	9,807,732,308	+1	9,807,732,307		231,235	$0.025213	10,172,971
Nov 9, 2022, 14:12	9,807,732,307	-130	9,807,732,307	-171	231,233	$0.025200	10,172,961
Nov 9, 2022, 14:11	9,807,732,437	-101	9,807,732,478		231,230	$0.025153	10,172,952
Nov 9, 2022, 14:10	9,807,732,538		9,807,732,478	-60	231,227	$0.025118	10,172,942
Nov 9, 2022, 14:09	9,807,732,538	-2	9,807,732,538	-2	231,217	$0.025105	10,172,933
Nov 9, 2022, 14:08	9,807,732,540	-21	9,807,732,540	-21	231,216	$0.025116	10,172,923
Nov 9, 2022, 14:07	9,807,732,561	-20	9,807,732,561	-20	231,213	$0.025079	10,172,913
Nov 9, 2022, 14:06	9,807,732,581	-7	9,807,732,581	-7	231,201	$0.025116	10,172,904
Nov 9, 2022, 14:05	9,807,732,588	-1	9,807,732,588	-88	231,198	$0.025180	10,172,894
Nov 9, 2022, 14:04	9,807,732,589	-87	9,807,732,676		231,189	$0.025187	10,172,884
Nov 9, 2022, 14:03	9,807,732,676	-93	9,807,732,676	-33	231,089	$0.025188	10,172,875
Nov 9, 2022, 14:02	9,807,732,769	-157	9,807,732,709	-217	231,082	$0.025109	10,172,865
Nov 9, 2022, 14:01	9,807,732,926	-41	9,807,732,926	-42	231,076	$0.024891	10,172,856
Nov 9, 2022, 14:00	9,807,732,967	-1,054	9,807,732,968		231,066	$0.025097	10,172,846
Nov 9, 2022, 13:59	9,807,734,021		9,807,732,968	-1,053	231,044	$0.025095	10,172,837
Nov 9, 2022, 13:58	9,807,734,021	-7	9,807,734,021	-7	231,021	$0.025079	10,172,827
Nov 9, 2022, 13:57	9,807,734,028	-101	9,807,734,028	-101	231,017	$0.025079	10,172,817
Nov 9, 2022, 13:56	9,807,734,129		9,807,734,129		231,014	$0.025134	10,172,808
Nov 9, 2022, 13:55	9,807,734,129	-20	9,807,734,129	-20	231,013	$0.025140	10,172,798
Nov 9, 2022, 13:54	9,807,734,149		9,807,734,149		231,012	$0.025130	10,172,789
Nov 9, 2022, 13:53	9,807,734,149		9,807,734,149		231,008	$0.024984	10,172,779
Nov 9, 2022, 13:52	9,807,734,149		9,807,734,149		231,007	$0.025024	10,172,769
Nov 9, 2022, 13:51	9,807,734,149		9,807,734,149		231,006	$0.025134	10,172,760
Nov 9, 2022, 13:50	9,807,734,149	-139	9,807,734,149	-139	231,005	$0.025128	10,172,750
Nov 9, 2022, 13:49	9,807,734,288	-80	9,807,734,288	-80	231,002	$0.025200	10,172,741
Nov 9, 2022, 13:48	9,807,734,368	-15	9,807,734,368	-15	231,000	$0.025153	10,172,731
Nov 9, 2022, 13:47	9,807,734,383		9,807,734,383		230,999	$0.025113	10,172,721
Nov 9, 2022, 13:46	9,807,734,383		9,807,734,383		230,996	$0.025164	10,172,712
Nov 9, 2022, 13:45	9,807,734,383		9,807,734,383	-1,364	230,993	$0.025134	10,172,702
Nov 9, 2022, 13:44	9,807,734,383	-1,364	9,807,735,747		230,966	$0.025189	10,172,693
Nov 9, 2022, 13:43	9,807,735,747	-51	9,807,735,747	-51	230,951	$0.024951	10,172,684
Nov 9, 2022, 13:42	9,807,735,798	-1	9,807,735,798		230,946	$0.024905	10,172,674
Nov 9, 2022, 13:41	9,807,735,799		9,807,735,798	-1	230,933	$0.024883	10,172,664
Nov 9, 2022, 13:40	9,807,735,799		9,807,735,799	-64	230,924	$0.024850	10,172,655
Nov 9, 2022, 13:39	9,807,735,799	-64	9,807,735,863		230,921	$0.024810	10,172,645
Nov 9, 2022, 13:38	9,807,735,863	-8	9,807,735,863	-8	230,875	$0.024802	10,172,635
Nov 9, 2022, 13:37	9,807,735,871	-604	9,807,735,871	-604	230,872	$0.024813	10,172,626
Nov 9, 2022, 13:36	9,807,736,475	-10	9,807,736,475	-10	230,870	$0.024881	10,172,616
Nov 9, 2022, 13:35	9,807,736,485		9,807,736,485		230,867	$0.024789	10,172,607
Nov 9, 2022, 13:34	9,807,736,485		9,807,736,485		230,860	$0.024800	10,172,597
Nov 9, 2022, 13:33	9,807,736,485		9,807,736,485	-1,368	230,859	$0.024934	10,172,587
Nov 9, 2022, 13:32	9,807,736,485	-1,368	9,807,737,853		230,858	$0.024938	10,172,578
Nov 9, 2022, 13:31	9,807,737,853	-369	9,807,737,853	-369	230,847	$0.024896	10,172,569
Nov 9, 2022, 13:30	9,807,738,222		9,807,738,222		230,844	$0.024900	10,172,559
Nov 9, 2022, 13:29	9,807,738,222	-1	9,807,738,222	-1	230,834	$0.024883	10,172,550
Nov 9, 2022, 13:28	9,807,738,223	-23	9,807,738,223	-23	230,832	$0.024800	10,172,540
Nov 9, 2022, 13:27	9,807,738,246		9,807,738,246		230,831	$0.024739	10,172,531
Nov 9, 2022, 13:26	9,807,738,246		9,807,738,246		230,822	$0.024880	10,172,521
Nov 9, 2022, 13:25	9,807,738,246		9,807,738,246	-1	230,799	$0.024797	10,172,511
Nov 9, 2022, 13:24	9,807,738,246	-1	9,807,738,247		230,797	$0.024824	10,172,502
Nov 9, 2022, 13:23	9,807,738,247	-1	9,807,738,247	-1	230,788	$0.024900	10,172,492
Nov 9, 2022, 13:22	9,807,738,248		9,807,738,248	-2	230,785	$0.024950	10,172,483
Nov 9, 2022, 13:21	9,807,738,248	-2	9,807,738,250		230,781	$0.024982	10,172,473
Nov 9, 2022, 13:20	9,807,738,250		9,807,738,250		230,779	$0.024701	10,172,464
Nov 9, 2022, 13:19	9,807,738,250		9,807,738,250		230,779	$0.024632	10,172,455
Nov 9, 2022, 13:18	9,807,738,250	-62	9,807,738,250		230,772	$0.024651	10,172,446
Nov 9, 2022, 13:17	9,807,738,312		9,807,738,250	-62	230,771	$0.024700	10,172,437
Nov 9, 2022, 13:16	9,807,738,312	-7	9,807,738,312		230,770	$0.024757	10,172,427
Nov 9, 2022, 13:15	9,807,738,319		9,807,738,312	-7	230,768	$0.024795	10,172,417
Nov 9, 2022, 13:14	9,807,738,319	-3	9,807,738,319	-4	230,766	$0.024604	10,172,408
Nov 9, 2022, 13:13	9,807,738,322	-1	9,807,738,323		230,765	$0.024579	10,172,398
Nov 9, 2022, 13:12	9,807,738,323	-625	9,807,738,323	-625	230,761	$0.024422	10,172,389
Nov 9, 2022, 13:11	9,807,738,948	-30	9,807,738,948	-29	230,731	$0.024399	10,172,379
Nov 9, 2022, 13:10	9,807,738,978		9,807,738,977	-1	230,714	$0.024512	10,172,369
Nov 9, 2022, 13:09	9,807,738,978	-4	9,807,738,978	-4	230,713	$0.024737	10,172,360
Nov 9, 2022, 13:08	9,807,738,982		9,807,738,982		230,709	$0.024810	10,172,350
Nov 9, 2022, 13:07	9,807,738,982	-27	9,807,738,982	-27	230,707	$0.024806	10,172,341
Nov 9, 2022, 13:06	9,807,739,009	-1	9,807,739,009		230,702	$0.024880	10,172,331
Nov 9, 2022, 13:05	9,807,739,010		9,807,739,009	-1	230,699	$0.025027	10,172,322
Nov 9, 2022, 13:04	9,807,739,010		9,807,739,010		230,697	$0.025026	10,172,312
Nov 9, 2022, 13:03	9,807,739,010	-31	9,807,739,010	-1	230,697	$0.025190	10,172,302
Nov 9, 2022, 13:02	9,807,739,041		9,807,739,011	-30	230,696	$0.025090	10,172,293
Nov 9, 2022, 13:01	9,807,739,041	-3	9,807,739,041	-3	230,694	$0.025050	10,172,283
Nov 9, 2022, 13:00	9,807,739,044	-16	9,807,739,044		230,691	$0.025010	10,172,274
Nov 9, 2022, 12:59	9,807,739,060		9,807,739,044	-16	230,686	$0.024967	10,172,264
Nov 9, 2022, 12:58	9,807,739,060	-1	9,807,739,060	-1	230,674	$0.024988	10,172,254
Nov 9, 2022, 12:57	9,807,739,061	-1,407	9,807,739,061	-1,407	230,670	$0.024834	10,172,245
Nov 9, 2022, 12:56	9,807,740,468		9,807,740,468		230,657	$0.024915	10,172,235
Nov 9, 2022, 12:55	9,807,740,468	-1,611	9,807,740,468	-1,411	230,656	$0.025016	10,172,226
Nov 9, 2022, 12:54	9,807,742,079		9,807,741,879	-200	230,654	$0.024970	10,172,216
Nov 9, 2022, 12:53	9,807,742,079	-22	9,807,742,079	-22	230,653	$0.024985	10,172,207
Nov 9, 2022, 12:52	9,807,742,101		9,807,742,101		230,646	$0.024950	10,172,197
Nov 9, 2022, 12:51	9,807,742,101		9,807,742,101		230,637	$0.024924	10,172,188
Nov 9, 2022, 12:50	9,807,742,101		9,807,742,101		230,635	$0.024948	10,172,178
Nov 9, 2022, 12:49	9,807,742,101		9,807,742,101		230,633	$0.025150	10,172,169
Nov 9, 2022, 12:48	9,807,742,101	-1	9,807,742,101	-1	230,631	$0.025250	10,172,160
Nov 9, 2022, 12:47	9,807,742,102		9,807,742,102		230,630	$0.025177	10,172,151
Nov 9, 2022, 12:46	9,807,742,102	-28	9,807,742,102	-29	230,628	$0.025138	10,172,141
Nov 9, 2022, 12:45	9,807,742,130	-1	9,807,742,131		230,623	$0.025150	10,172,131
Nov 9, 2022, 12:44	9,807,742,131	-1	9,807,742,131	-1	230,621	$0.025125	10,172,121
Nov 9, 2022, 12:43	9,807,742,132		9,807,742,132		230,620	$0.025194	10,172,036
Nov 9, 2022, 12:42	9,807,742,132	-104	9,807,742,132	-3	230,613	$0.025087	10,172,102
Nov 9, 2022, 12:41	9,807,742,236		9,807,742,135	-125	230,613	$0.025204	10,172,093
Nov 9, 2022, 12:40	9,807,742,236	-35	9,807,742,260		230,612	$0.024944	10,172,084

Date / Time

Circulating Supply

Difference

Total Supply

Difference

Comm. Pool

USD per coin

Block

Nov 9, 2022, 14:19

9,807,726,094

-1

9,807,726,094

-1

231,250

$0.024981

10,173,027

Nov 9, 2022, 14:18

9,807,726,095

-6,126

9,807,726,095

-6,126

231,247

$0.024948

10,173,017

Nov 9, 2022, 14:17

9,807,732,221

-60

9,807,732,221

-60

231,243

$0.024981

10,173,009

Nov 9, 2022, 14:16

9,807,732,281

-23

9,807,732,281

-23

231,242

$0.025025

10,172,999

Nov 9, 2022, 14:15

9,807,732,304

231,239

$0.025125

10,172,991

Nov 9, 2022, 14:14

9,807,732,304

-4

9,807,732,304

-3

231,237

$0.025155

10,172,981

Nov 9, 2022, 14:13

9,807,732,308

9,807,732,307

231,235

$0.025213

10,172,971

Nov 9, 2022, 14:12

9,807,732,307

-130

9,807,732,307

-171

231,233

$0.025200

10,172,961

Nov 9, 2022, 14:11

9,807,732,437

-101

9,807,732,478

231,230

$0.025153

10,172,952

Nov 9, 2022, 14:10

9,807,732,538

9,807,732,478

-60

231,227

$0.025118

10,172,942

Nov 9, 2022, 14:09

9,807,732,538

-2

9,807,732,538

-2

231,217

$0.025105

10,172,933

Nov 9, 2022, 14:08

9,807,732,540

-21

9,807,732,540

-21

231,216

$0.025116

10,172,923

Nov 9, 2022, 14:07

9,807,732,561

-20

9,807,732,561

-20

231,213

$0.025079

10,172,913

Nov 9, 2022, 14:06

9,807,732,581

-7

9,807,732,581

-7

231,201

$0.025116

10,172,904

Nov 9, 2022, 14:05

9,807,732,588

-1

9,807,732,588

-88

231,198

$0.025180

10,172,894

Nov 9, 2022, 14:04

9,807,732,589

-87

9,807,732,676

231,189

$0.025187

10,172,884

Nov 9, 2022, 14:03

9,807,732,676

-93

9,807,732,676

-33

231,089

$0.025188

10,172,875

Nov 9, 2022, 14:02

9,807,732,769

-157

9,807,732,709

-217

231,082

$0.025109

10,172,865

Nov 9, 2022, 14:01

9,807,732,926

-41

9,807,732,926

-42

231,076

$0.024891

10,172,856

Nov 9, 2022, 14:00

9,807,732,967

-1,054

9,807,732,968

231,066

$0.025097

10,172,846

Nov 9, 2022, 13:59

9,807,734,021

9,807,732,968

-1,053

231,044

$0.025095

10,172,837

Nov 9, 2022, 13:58

9,807,734,021

-7

9,807,734,021

-7

231,021

$0.025079

10,172,827

Nov 9, 2022, 13:57

9,807,734,028

-101

9,807,734,028

-101

231,017

$0.025079

10,172,817

Nov 9, 2022, 13:56

9,807,734,129

231,014

$0.025134

10,172,808

Nov 9, 2022, 13:55

9,807,734,129

-20

9,807,734,129

-20

231,013

$0.025140

10,172,798

Nov 9, 2022, 13:54

9,807,734,149

231,012

$0.025130

10,172,789

Nov 9, 2022, 13:53

9,807,734,149

231,008

$0.024984

10,172,779

Nov 9, 2022, 13:52

9,807,734,149

231,007

$0.025024

10,172,769

Nov 9, 2022, 13:51

9,807,734,149

231,006

$0.025134

10,172,760

Nov 9, 2022, 13:50

9,807,734,149

-139

9,807,734,149

-139

231,005

$0.025128

10,172,750

Nov 9, 2022, 13:49

9,807,734,288

-80

9,807,734,288

-80

231,002

$0.025200

10,172,741

Nov 9, 2022, 13:48

9,807,734,368

-15

9,807,734,368

-15

231,000

$0.025153

10,172,731

Nov 9, 2022, 13:47

9,807,734,383

230,999

$0.025113

10,172,721

Nov 9, 2022, 13:46

9,807,734,383

230,996

$0.025164

10,172,712

Nov 9, 2022, 13:45

9,807,734,383

-1,364

230,993

$0.025134

10,172,702

Nov 9, 2022, 13:44

9,807,734,383

-1,364

9,807,735,747

230,966

$0.025189

10,172,693

Nov 9, 2022, 13:43

9,807,735,747

-51

9,807,735,747

-51

230,951

$0.024951

10,172,684

Nov 9, 2022, 13:42

9,807,735,798

-1

9,807,735,798

230,946

$0.024905

10,172,674

Nov 9, 2022, 13:41

9,807,735,799

9,807,735,798

-1

230,933

$0.024883

10,172,664

Nov 9, 2022, 13:40

9,807,735,799

-64

230,924

$0.024850

10,172,655

Nov 9, 2022, 13:39

9,807,735,799

-64

9,807,735,863

230,921

$0.024810

10,172,645

Nov 9, 2022, 13:38

9,807,735,863

-8

9,807,735,863

-8

230,875

$0.024802

10,172,635

Nov 9, 2022, 13:37

9,807,735,871

-604

9,807,735,871

-604

230,872

$0.024813

10,172,626

Nov 9, 2022, 13:36

9,807,736,475

-10

9,807,736,475

-10

230,870

$0.024881

10,172,616

Nov 9, 2022, 13:35

9,807,736,485

230,867

$0.024789

10,172,607

Nov 9, 2022, 13:34

9,807,736,485

230,860

$0.024800

10,172,597

Nov 9, 2022, 13:33

9,807,736,485

-1,368

230,859

$0.024934

10,172,587

Nov 9, 2022, 13:32

9,807,736,485

-1,368

9,807,737,853

230,858

$0.024938

10,172,578

Nov 9, 2022, 13:31

9,807,737,853

-369

9,807,737,853

-369

230,847

$0.024896

10,172,569

Nov 9, 2022, 13:30

9,807,738,222

230,844

$0.024900

10,172,559

Nov 9, 2022, 13:29

9,807,738,222

-1

9,807,738,222

-1

230,834

$0.024883

10,172,550

Nov 9, 2022, 13:28

9,807,738,223

-23

9,807,738,223

-23

230,832

$0.024800

10,172,540

Nov 9, 2022, 13:27

9,807,738,246

230,831

$0.024739

10,172,531

Nov 9, 2022, 13:26

9,807,738,246

230,822

$0.024880

10,172,521

Nov 9, 2022, 13:25

9,807,738,246

-1

230,799

$0.024797

10,172,511

Nov 9, 2022, 13:24

9,807,738,246

-1

9,807,738,247

230,797

$0.024824

10,172,502

Nov 9, 2022, 13:23

9,807,738,247

-1

9,807,738,247

-1

230,788

$0.024900

10,172,492

Nov 9, 2022, 13:22

9,807,738,248

-2

230,785

$0.024950

10,172,483

Nov 9, 2022, 13:21

9,807,738,248

-2

9,807,738,250

230,781

$0.024982

10,172,473

Nov 9, 2022, 13:20

9,807,738,250

230,779

$0.024701

10,172,464

Nov 9, 2022, 13:19

9,807,738,250

230,779

$0.024632

10,172,455

Nov 9, 2022, 13:18

9,807,738,250

-62

9,807,738,250

230,772

$0.024651

10,172,446

Nov 9, 2022, 13:17

9,807,738,312

9,807,738,250

-62

230,771

$0.024700

10,172,437

Nov 9, 2022, 13:16

9,807,738,312

-7

9,807,738,312

230,770

$0.024757

10,172,427

Nov 9, 2022, 13:15

9,807,738,319

9,807,738,312

-7

230,768

$0.024795

10,172,417

Nov 9, 2022, 13:14

9,807,738,319

-3

9,807,738,319

-4

230,766

$0.024604

10,172,408

Nov 9, 2022, 13:13

9,807,738,322

-1

9,807,738,323

230,765

$0.024579

10,172,398

Nov 9, 2022, 13:12

9,807,738,323

-625

9,807,738,323

-625

230,761

$0.024422

10,172,389

Nov 9, 2022, 13:11

9,807,738,948

-30

9,807,738,948

-29

230,731

$0.024399

10,172,379

Nov 9, 2022, 13:10

9,807,738,978

9,807,738,977

-1

230,714

$0.024512

10,172,369

Nov 9, 2022, 13:09

9,807,738,978

-4

9,807,738,978

-4

230,713

$0.024737

10,172,360

Nov 9, 2022, 13:08

9,807,738,982

230,709

$0.024810

10,172,350

Nov 9, 2022, 13:07

9,807,738,982

-27

9,807,738,982

-27

230,707

$0.024806

10,172,341

Nov 9, 2022, 13:06

9,807,739,009

-1

9,807,739,009

230,702

$0.024880

10,172,331

Nov 9, 2022, 13:05

9,807,739,010

9,807,739,009

-1

230,699

$0.025027

10,172,322

Nov 9, 2022, 13:04

9,807,739,010

230,697

$0.025026

10,172,312

Nov 9, 2022, 13:03

9,807,739,010

-31

9,807,739,010

-1

230,697

$0.025190

10,172,302

Nov 9, 2022, 13:02

9,807,739,041

9,807,739,011

-30

230,696

$0.025090

10,172,293

Nov 9, 2022, 13:01

9,807,739,041

-3

9,807,739,041

-3

230,694

$0.025050

10,172,283

Nov 9, 2022, 13:00

9,807,739,044

-16

9,807,739,044

230,691

$0.025010

10,172,274

Nov 9, 2022, 12:59

9,807,739,060

9,807,739,044

-16

230,686

$0.024967

10,172,264

Nov 9, 2022, 12:58

9,807,739,060

-1

9,807,739,060

-1

230,674

$0.024988

10,172,254

Nov 9, 2022, 12:57

9,807,739,061

-1,407

9,807,739,061

-1,407

230,670

$0.024834

10,172,245

Nov 9, 2022, 12:56

9,807,740,468

230,657

$0.024915

10,172,235

Nov 9, 2022, 12:55

9,807,740,468

-1,611

9,807,740,468

-1,411

230,656

$0.025016

10,172,226

Nov 9, 2022, 12:54

9,807,742,079

9,807,741,879

-200

230,654

$0.024970

10,172,216

Nov 9, 2022, 12:53

9,807,742,079

-22

9,807,742,079

-22

230,653

$0.024985

10,172,207

Nov 9, 2022, 12:52

9,807,742,101

230,646

$0.024950

10,172,197

Nov 9, 2022, 12:51

9,807,742,101

230,637

$0.024924

10,172,188

Nov 9, 2022, 12:50

9,807,742,101

230,635

$0.024948

10,172,178

Nov 9, 2022, 12:49

9,807,742,101

230,633

$0.025150

10,172,169

Nov 9, 2022, 12:48

9,807,742,101

-1

9,807,742,101

-1

230,631

$0.025250

10,172,160

Nov 9, 2022, 12:47

9,807,742,102

230,630

$0.025177

10,172,151

Nov 9, 2022, 12:46

9,807,742,102

-28

9,807,742,102

-29

230,628

$0.025138

10,172,141

Nov 9, 2022, 12:45

9,807,742,130

-1

9,807,742,131

230,623

$0.025150

10,172,131

Nov 9, 2022, 12:44

9,807,742,131

-1

9,807,742,131

-1

230,621

$0.025125

10,172,121

Nov 9, 2022, 12:43

9,807,742,132

230,620

$0.025194

10,172,036

Nov 9, 2022, 12:42

9,807,742,132

-104

9,807,742,132

-3

230,613

$0.025087

10,172,102

Nov 9, 2022, 12:41

9,807,742,236

9,807,742,135

-125

230,613

$0.025204

10,172,093

Nov 9, 2022, 12:40

9,807,742,236

-35

9,807,742,260

230,612

$0.024944

10,172,084

The difference cells relate to the supply cells to the left. The figure can be positive, negative or zero. The difference is calculated as the difference between the supply to the left of it at the given time snapshot and the supply column above it. In other words, how much the supply has gone up or down in that time period. On page 1, the top difference cell shows the difference during the currrent time period and the next to appear. This row is higlighted to show this is ongoing. Other columns show a snapshot of data taken at the given day and time in the far left column. All times shown are GMT (Greenwich Mean Time). To highlight rows just tap or click on the row(s) to cycle background colours.