#636471

#636471

Color Values

HEX

#636471

RGB

99, 100, 113

HSL

235.7, 6.6%, 41.6%

HSV

235.7, 12.4%, 44.3%

CMYK

12.4%, 11.5%, 0.0%, 55.7%

OKLCH

0.5069 0.0205 282.1

Properties

Cool Dark Nearest: RAL 4012 Pearl Blackberry

Color Harmonies

Complementary

#636471

#717063

Analogous

#636B71

#696371

#636471

Triadic

#636471

#716364

#647163

Split Complementary

#636471

#716963

#6B7163

Tetradic

#636471

#71636B

#717063

#637169

Color Blindness Simulation

Original

#636471

Protanopia

#63636E

Deuteranopia

#63636D

Tritanopia

#636B6B

Achromatopsia

#656565

CSS Usage

background-color: #636471;
color: #636471;
border-color: #636471;
Nearest Tailwind: Gray 500 #6B7280

Tailwind Shades

50
#F7F7F8
100
#ECECEE
200
#D9D9DE
300
#BEBEC6
400
#9A9BA7
500
#777888
600
#5F606D
700
#4C4D57
800
#3C3C44
900
#2E2E33
950
#1D1D20

Contrast Checker

Text on white

5.85:1

AA Pass AAA Fail

Text on black

3.59:1

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