#231B29

#231B29

Color Values

HEX

#231B29

RGB

35, 27, 41

HSL

274.3, 20.6%, 13.3%

HSV

274.3, 34.1%, 16.1%

CMYK

14.6%, 34.1%, 0.0%, 83.9%

OKLCH

0.2381 0.0286 310.2

Properties

Cool Dark Nearest: RAL 5011 Steel Blue

Color Harmonies

Complementary

#231B29

#21291B

Analogous

#1C1B29

#291B28

#231B29

Triadic

#231B29

#29231B

#1B2923

Split Complementary

#231B29

#28291B

#1B291C

Tetradic

#231B29

#291C1B

#21291B

#1B2829

Color Blindness Simulation

Original

#231B29

Protanopia

#201F26

Deuteranopia

#202125

Tritanopia

#232322

Achromatopsia

#1E1E1E

CSS Usage

background-color: #231B29;
color: #231B29;
border-color: #231B29;
Nearest Tailwind: Gray 900 #111827

Tailwind Shades

50
#F8F6F9
100
#EEEAF0
200
#DCD4E3
300
#C4B5CE
400
#A38DB4
500
#83659A
600
#69517B
700
#544162
800
#42334D
900
#322739
950
#1F1924

Contrast Checker

Text on white

16.66:1

AA Pass AAA Pass

Text on black

1.26:1

AA Fail AAA Fail

Related Articles

Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026
Tutorials

How to Choose Brand Colors: A Step-by-Step Guide

Jan 18, 2026