#121741

#121741

Color Values

HEX

#121741

RGB

18, 23, 65

HSL

233.6, 56.6%, 16.3%

HSV

233.6, 72.3%, 25.5%

CMYK

72.3%, 64.6%, 0.0%, 74.5%

OKLCH

0.2293 0.0792 273.3

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#121741

#413C12

Analogous

#122F41

#251241

#121741

Triadic

#121741

#411217

#174112

Split Complementary

#121741

#412512

#2F4112

Tetradic

#121741

#41122F

#413C12

#124125

Color Blindness Simulation

Original

#121741

Protanopia

#141437

Deuteranopia

#141434

Tritanopia

#122F2D

Achromatopsia

#191919

CSS Usage

background-color: #121741;
color: #121741;
border-color: #121741;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F4F4FB
100
#E5E6F6
200
#C7CBF0
300
#9FA7E4
400
#6B77D6
500
#3747C8
600
#2C39A0
700
#232D80
800
#1C2364
900
#181D49
950
#0F122E

Contrast Checker

Text on white

17.15:1

AA Pass AAA Pass

Text on black

1.22:1

AA Fail AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

Jan 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

Jan 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

Jan 15, 2026