#90231F

#90231F

Color Values

HEX

#90231F

RGB

144, 35, 31

HSL

2,1, 64,6%, 34,3%

HSV

2,1, 78,5%, 56,5%

CMYK

0,0%, 75,7%, 78,5%, 43,5%

OKLCH

0,4339 0,1455 27,3

Properties

Warm Dark Nearest: firebrick 4

Color Harmonies

Complementary

#90231F

#1F8C90

Analogous

#901F54

#905B1F

#90231F

Triadic

#90231F

#1F9023

#231F90

Split Complementary

#90231F

#1F905B

#1F5490

Tetradic

#90231F

#54901F

#1F8C90

#5B1F90

Color Blindness Simulation

Original

#90231F

Protanopia

#616020

Deuteranopia

#676F20

Tritanopia

#8B2121

Achromatopsia

#3A3A3A

CSS Usage

background-color: #90231F;
color: #90231F;
border-color: #90231F;
Nearest Tailwind: Red 800 #991B1B

Tailwind Shades

50
#FCF3F3
100
#F7E4E3
200
#F2C6C4
300
#E99D9A
400
#DE6864
500
#D2332D
600
#A82924
700
#86211D
800
#691917
900
#4D1614
950
#300E0D

Contrast Checker

Text on white

8,59:1

AA Pass AAA Pass

Text on black

2,45:1

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