#404C56

#404C56

Color Values

HEX

#404C56

RGB

64, 76, 86

HSL

207.3, 14.7%, 29.4%

HSV

207.3, 25.6%, 33.7%

CMYK

25.6%, 11.6%, 0.0%, 66.3%

OKLCH

0.4099 0.0228 243.5

Properties

Cool Dark Nearest: RAL 7015 Slate Grey

Color Harmonies

Complementary

#404C56

#564A40

Analogous

#405655

#404156

#404C56

Triadic

#404C56

#56404C

#4C5640

Split Complementary

#404C56

#564041

#565540

Tetradic

#404C56

#554056

#564A40

#415640

Color Blindness Simulation

Original

#404C56

Protanopia

#454554

Deuteranopia

#444453

Tritanopia

#415251

Achromatopsia

#4A4A4A

CSS Usage

background-color: #404C56;
color: #404C56;
border-color: #404C56;
Nearest Tailwind: Gray 600 #4B5563

Tailwind Shades

50
#F6F7F8
100
#EBEDEF
200
#D6DCE1
300
#B9C3CB
400
#93A2AF
500
#6D8192
600
#576775
700
#46535E
800
#364149
900
#2A3137
950
#1B1F23

Contrast Checker

Text on white

8.8:1

AA Pass AAA Pass

Text on black

2.39:1

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