#21182B

#21182B

Color Values

HEX

#21182B

RGB

33, 24, 43

HSL

268.4, 28.4%, 13.1%

HSV

268.4, 44.2%, 16.9%

CMYK

23.3%, 44.2%, 0.0%, 83.1%

OKLCH

0.2295 0.0379 305.4

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#21182B

#222B18

Analogous

#18182B

#2A182B

#21182B

Triadic

#21182B

#2B2118

#182B21

Split Complementary

#21182B

#2B2A18

#182B18

Tetradic

#21182B

#2B1818

#222B18

#182B2A

Color Blindness Simulation

Original

#21182B

Protanopia

#1D1D26

Deuteranopia

#1E1E25

Tritanopia

#212322

Achromatopsia

#1B1B1B

CSS Usage

background-color: #21182B;
color: #21182B;
border-color: #21182B;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F7F6F9
100
#EDE9F1
200
#DBD1E5
300
#C1B0D3
400
#9F86BB
500
#7E5BA4
600
#644983
700
#503A69
800
#3F2E52
900
#30243D
950
#1E1726

Contrast Checker

Text on white

17.07:1

AA Pass AAA Pass

Text on black

1.23:1

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