#21041F

#21041F

Color Values

HEX

#21041F

RGB

33, 4, 31

HSL

304.1, 78.4%, 7.3%

HSV

304.1, 87.9%, 12.9%

CMYK

0.0%, 87.9%, 6.1%, 87.1%

OKLCH

0.1808 0.0667 330.7

Properties

Warm Dark Nearest: RAL 5011 Steel Blue

Color Harmonies

Complementary

#21041F

#042106

Analogous

#150421

#210411

#21041F

Triadic

#21041F

#1F2104

#041F21

Split Complementary

#21041F

#112104

#042115

Tetradic

#21041F

#211504

#042106

#041121

Color Blindness Simulation

Original

#21041F

Protanopia

#141418

Deuteranopia

#161817

Tritanopia

#201312

Achromatopsia

#0C0C0C

CSS Usage

background-color: #21041F;
color: #21041F;
border-color: #21041F;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#FCF2FC
100
#F9E1F7
200
#F7BFF3
300
#F292EB
400
#EB57E1
500
#E31CD6
600
#B616AB
700
#921289
800
#720E6B
900
#530E4E
950
#340931

Contrast Checker

Text on white

19.06:1

AA Pass AAA Pass

Text on black

1.1:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Feb 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Feb 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Feb 19, 2026