#403F63

#403F63

Color Values

HEX

#403F63

RGB

64, 63, 99

HSL

241.7, 22.2%, 31.8%

HSV

241.7, 36.4%, 38.8%

CMYK

35.4%, 36.4%, 0.0%, 61.2%

OKLCH

0.3852 0.0607 284.4

Properties

Cool Dark Nearest: RAL 5000 Violet Blue

Color Harmonies

Complementary

#403F63

#62633F

Analogous

#3F5063

#523F63

#403F63

Triadic

#403F63

#63403F

#3F6340

Split Complementary

#403F63

#63523F

#50633F

Tetradic

#403F63

#633F50

#62633F

#3F6352

Color Blindness Simulation

Original

#403F63

Protanopia

#40405A

Deuteranopia

#404058

Tritanopia

#405352

Achromatopsia

#424242

CSS Usage

background-color: #403F63;
color: #403F63;
border-color: #403F63;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F6F6F9
100
#EAEAF1
200
#D4D3E3
300
#B5B4CF
400
#8D8CB6
500
#65639C
600
#514F7D
700
#413F64
800
#32324E
900
#27273A
950
#191825

Contrast Checker

Text on white

9.96:1

AA Pass AAA Pass

Text on black

2.11:1

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