#404457

#404457

Color Values

HEX

#404457

RGB

64, 68, 87

HSL

229.6, 15.2%, 29.6%

HSV

229.6, 26.4%, 34.1%

CMYK

26.4%, 21.8%, 0.0%, 65.9%

OKLCH

0.3907 0.0327 275.5

Properties

Cool Dark Nearest: RAL 7015 Slate Grey

Color Harmonies

Complementary

#404457

#575340

Analogous

#404F57

#484057

#404457

Triadic

#404457

#574044

#445740

Split Complementary

#404457

#574840

#4F5740

Tetradic

#404457

#57404F

#575340

#405748

Color Blindness Simulation

Original

#404457

Protanopia

#424252

Deuteranopia

#424151

Tritanopia

#404F4E

Achromatopsia

#454545

CSS Usage

background-color: #404457;
color: #404457;
border-color: #404457;
Nearest Tailwind: Gray 700 #374151

Tailwind Shades

50
#F6F7F8
100
#EBECEF
200
#D6D8E1
300
#B8BCCB
400
#9297AF
500
#6C7393
600
#565C76
700
#45495E
800
#363949
900
#2A2C37
950
#1A1C23

Contrast Checker

Text on white

9.62:1

AA Pass AAA Pass

Text on black

2.18:1

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