#21101C

#21101C

Color Values

HEX

#21101C

RGB

33, 16, 28

HSL

317.6, 34.7%, 9.6%

HSV

317.6, 51.5%, 12.9%

CMYK

0.0%, 51.5%, 15.2%, 87.1%

OKLCH

0.2026 0.0353 338.6

Properties

Warm Dark Nearest: RAL 5011 Steel Blue

Color Harmonies

Complementary

#21101C

#102115

Analogous

#1D1021

#211013

#21101C

Triadic

#21101C

#1C2110

#101C21

Split Complementary

#21101C

#132110

#10211D

Tetradic

#21101C

#211D10

#102115

#101321

Color Blindness Simulation

Original

#21101C

Protanopia

#1A1919

Deuteranopia

#1B1C18

Tritanopia

#201716

Achromatopsia

#141414

CSS Usage

background-color: #21101C;
color: #21101C;
border-color: #21101C;
Nearest Tailwind: Zinc 900 #18181B

Tailwind Shades

50
#FAF5F8
100
#F2E8EF
200
#E8CFE0
300
#D7ADCB
400
#C180AE
500
#AC5392
600
#894375
700
#6E355D
800
#562A49
900
#402137
950
#281523

Contrast Checker

Text on white

18.17:1

AA Pass AAA Pass

Text on black

1.16:1

AA Fail AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

Jan 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

Jan 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

Jan 15, 2026