#423751

#423751

Color Values

HEX

#423751

RGB

66, 55, 81

HSL

265.4, 19.1%, 26.7%

HSV

265.4, 32.1%, 31.8%

CMYK

18.5%, 32.1%, 0.0%, 68.2%

OKLCH

0.3595 0.0462 303.5

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#423751

#465137

Analogous

#373951

#4F3751

#423751

Triadic

#423751

#514237

#375142

Split Complementary

#423751

#514F37

#395137

Tetradic

#423751

#513739

#465137

#37514F

Color Blindness Simulation

Original

#423751

Protanopia

#3D3D4B

Deuteranopia

#3E3F49

Tritanopia

#414645

Achromatopsia

#3B3B3B

CSS Usage

background-color: #423751;
color: #423751;
border-color: #423751;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F7F6F9
100
#EDEAF0
200
#DAD4E2
300
#C0B6CD
400
#9E8FB3
500
#7C6798
600
#635379
700
#4F4261
800
#3E344C
900
#2F2839
950
#1E1924

Contrast Checker

Text on white

11.07:1

AA Pass AAA Pass

Text on black

1.9:1

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