#212151

#212151

Color Values

HEX

#212151

RGB

33, 33, 81

HSL

240.0, 42.1%, 22.4%

HSV

240.0, 59.3%, 31.8%

CMYK

59.3%, 59.3%, 0.0%, 68.2%

OKLCH

0.278 0.0856 279.3

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#212151

#515121

Analogous

#213951

#392151

#212151

Triadic

#212151

#512121

#215121

Split Complementary

#212151

#513921

#395121

Tetradic

#212151

#512139

#515121

#215139

Color Blindness Simulation

Original

#212151

Protanopia

#212145

Deuteranopia

#212143

Tritanopia

#213C3A

Achromatopsia

#242424

CSS Usage

background-color: #212151;
color: #212151;
border-color: #212151;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F5F5FA
100
#E7E7F4
200
#CCCCEA
300
#A8A8DC
400
#7979C8
500
#4A4AB5
600
#3B3B91
700
#2F2F74
800
#25255B
900
#1E1E43
950
#13132A

Contrast Checker

Text on white

14.99:1

AA Pass AAA Pass

Text on black

1.4:1

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