#404358

#404358

Color Values

HEX

#404358

RGB

64, 67, 88

HSL

232.5, 15.8%, 29.8%

HSV

232.5, 27.3%, 34.5%

CMYK

27.3%, 23.9%, 0.0%, 65.5%

OKLCH

0.3888 0.0358 278.3

Properties

Cool Dark Nearest: RAL 7015 Slate Grey

Color Harmonies

Complementary

#404358

#585540

Analogous

#404F58

#494058

#404358

Triadic

#404358

#584043

#435840

Split Complementary

#404358

#584940

#4F5840

Tetradic

#404358

#58404F

#585540

#405849

Color Blindness Simulation

Original

#404358

Protanopia

#414153

Deuteranopia

#414152

Tritanopia

#404F4E

Achromatopsia

#444444

CSS Usage

background-color: #404358;
color: #404358;
border-color: #404358;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F6F7F8
100
#EBEBF0
200
#D6D7E1
300
#B8BBCB
400
#9295B0
500
#6B7094
600
#565A76
700
#45485E
800
#36384A
900
#2A2B37
950
#1A1B23

Contrast Checker

Text on white

9.71:1

AA Pass AAA Pass

Text on black

2.16:1

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