#900D11

#900D11

Color Values

HEX

#900D11

RGB

144, 13, 17

HSL

358.2, 83.4%, 30.8%

HSV

358.2, 91.0%, 56.5%

CMYK

0.0%, 91.0%, 88.2%, 43.5%

OKLCH

0.4166 0.1619 27.2

Properties

Warm Dark Nearest: RAL 3003 Ruby Red

Color Harmonies

Complementary

#900D11

#0D908C

Analogous

#900D52

#904B0D

#900D11

Triadic

#900D11

#11900D

#0D1190

Split Complementary

#900D11

#0D904B

#0D5290

Tetradic

#900D11

#52900D

#0D908C

#4B0D90

Color Blindness Simulation

Original

#900D11

Protanopia

#575610

Deuteranopia

#5F6910

Tritanopia

#890F0F

Achromatopsia

#292929

CSS Usage

background-color: #900D11;
color: #900D11;
border-color: #900D11;
Nearest Tailwind: Red 800 #991B1B

Tailwind Shades

50
#FDF2F2
100
#FAE0E1
200
#F9BEBF
300
#F58F92
400
#EF5257
500
#EA151C
600
#BB1116
700
#960E12
800
#750B0E
900
#550C0E
950
#360809

Contrast Checker

Text on white

9.33:1

AA Pass AAA Pass

Text on black

2.25:1

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