#21252F

#21252F

Color Values

HEX

#21252F

RGB

33, 37, 47

HSL

222.9, 17.5%, 15.7%

HSV

222.9, 29.8%, 18.4%

CMYK

29.8%, 21.3%, 0.0%, 81.6%

OKLCH

0.2649 0.0196 267.9

Properties

Cool Dark Nearest: RAL 5008 Grey Blue

Color Harmonies

Complementary

#21252F

#2F2B21

Analogous

#212C2F

#24212F

#21252F

Triadic

#21252F

#2F2125

#252F21

Split Complementary

#21252F

#2F2421

#2C2F21

Tetradic

#21252F

#2F212C

#2F2B21

#212F24

Color Blindness Simulation

Original

#21252F

Protanopia

#23232D

Deuteranopia

#22222C

Tritanopia

#212B2A

Achromatopsia

#252525

CSS Usage

background-color: #21252F;
color: #21252F;
border-color: #21252F;
Nearest Tailwind: Gray 800 #1F2937

Tailwind Shades

50
#F6F7F8
100
#EAECF0
200
#D5D9E2
300
#B7BDCD
400
#909AB1
500
#697696
600
#545E78
700
#434B60
800
#353B4B
900
#292D38
950
#1A1D23

Contrast Checker

Text on white

15.32:1

AA Pass AAA Pass

Text on black

1.37:1

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