#404151

#404151

Color Values

HEX

#404151

RGB

64, 65, 81

HSL

236.5, 11.7%, 28.4%

HSV

236.5, 21.0%, 31.8%

CMYK

21.0%, 19.8%, 0.0%, 68.2%

OKLCH

0.3808 0.0272 282.2

Properties

Cool Dark Nearest: RAL 7015 Slate Grey

Color Harmonies

Complementary

#404151

#515040

Analogous

#404951

#474051

#404151

Triadic

#404151

#514041

#415140

Split Complementary

#404151

#514740

#495140

Tetradic

#404151

#514049

#515040

#405147

Color Blindness Simulation

Original

#404151

Protanopia

#40404D

Deuteranopia

#40404C

Tritanopia

#404A49

Achromatopsia

#424242

CSS Usage

background-color: #404151;
color: #404151;
border-color: #404151;
Nearest Tailwind: Gray 700 #374151

Tailwind Shades

50
#F7F7F8
100
#EBECEF
200
#D7D8DF
300
#BBBBC9
400
#9697AC
500
#71728E
600
#5A5B72
700
#48495B
800
#383947
900
#2B2C36
950
#1B1C22

Contrast Checker

Text on white

10.03:1

AA Pass AAA Pass

Text on black

2.09:1

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