#28313B

#28313B

Color Values

HEX

#28313B

RGB

40, 49, 59

HSL

211.6, 19.2%, 19.4%

HSV

211.6, 32.2%, 23.1%

CMYK

32.2%, 16.9%, 0.0%, 76.9%

OKLCH

0.309 0.0219 251.2

Properties

Cool Dark Nearest: RAL 7026 Granite Grey

Color Harmonies

Complementary

#28313B

#3B3228

Analogous

#283A3B

#28283B

#28313B

Triadic

#28313B

#3B2831

#313B28

Split Complementary

#28313B

#3B2828

#3A3B28

Tetradic

#28313B

#3B283A

#3B3228

#283B28

Color Blindness Simulation

Original

#28313B

Protanopia

#2C2C39

Deuteranopia

#2B2B38

Tritanopia

#283736

Achromatopsia

#303030

CSS Usage

background-color: #28313B;
color: #28313B;
border-color: #28313B;
Nearest Tailwind: Gray 800 #1F2937

Tailwind Shades

50
#F6F7F9
100
#EAEDF0
200
#D4DBE2
300
#B6C1CE
400
#8FA0B3
500
#677E98
600
#52657A
700
#425161
800
#343F4C
900
#283039
950
#191E24

Contrast Checker

Text on white

13.19:1

AA Pass AAA Pass

Text on black

1.59:1

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