#121237

#121237

Color Values

HEX

#121237

RGB

18, 18, 55

HSL

240,0, 50,7%, 14,3%

HSV

240,0, 67,3%, 21,6%

CMYK

67,3%, 67,3%, 0,0%, 78,4%

OKLCH

0,2084 0,0703 278,4

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#121237

#373712

Analogous

#122437

#241237

#121237

Triadic

#121237

#371212

#123712

Split Complementary

#121237

#372412

#243712

Tetradic

#121237

#371224

#373712

#123724

Color Blindness Simulation

Original

#121237

Protanopia

#12122E

Deuteranopia

#12122C

Tritanopia

#122725

Achromatopsia

#151515

CSS Usage

background-color: #121237;
color: #121237;
border-color: #121237;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F4F4FB
100
#E5E5F5
200
#C9C9ED
300
#A3A3E1
400
#7171D0
500
#3F3FC0
600
#32329A
700
#28287B
800
#1F1F60
900
#1A1A47
950
#11112D

Contrast Checker

Text on white

17,99:1

AA Pass AAA Pass

Text on black

1,17:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Фев 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Фев 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Фев 19, 2026