#21287D

#21287D

Color Values

HEX

#21287D

RGB

33, 40, 125

HSL

235.4, 58.2%, 31.0%

HSV

235.4, 73.6%, 49.0%

CMYK

73.6%, 68.0%, 0.0%, 51.0%

OKLCH

0.3327 0.1416 272.3

Properties

Cool Dark Nearest: midnightblue

Color Harmonies

Complementary

#21287D

#7D7621

Analogous

#21567D

#48217D

#21287D

Triadic

#21287D

#7D2128

#287D21

Split Complementary

#21287D

#7D4821

#567D21

Tetradic

#21287D

#7D2156

#7D7621

#217D48

Color Blindness Simulation

Original

#21287D

Protanopia

#242468

Deuteranopia

#242364

Tritanopia

#215855

Achromatopsia

#2D2D2D

CSS Usage

background-color: #21287D;
color: #21287D;
border-color: #21287D;
Nearest Tailwind: Indigo 900 #312E81

Tailwind Shades

50
#F4F4FB
100
#E4E6F6
200
#C7CAF0
300
#9EA4E5
400
#6A72D8
500
#3541CA
600
#2B34A1
700
#222981
800
#1B2065
900
#171B4A
950
#0F112F

Contrast Checker

Text on white

12.62:1

AA Pass AAA Pass

Text on black

1.66:1

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