#12043B

#12043B

Color Values

HEX

#12043B

RGB

18, 4, 59

HSL

255.3, 87.3%, 12.4%

HSV

255.3, 93.2%, 23.1%

CMYK

69.5%, 93.2%, 0.0%, 76.9%

OKLCH

0.1861 0.097 284.5

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#12043B

#2D3B04

Analogous

#04123B

#2E043B

#12043B

Triadic

#12043B

#3B1204

#043B12

Split Complementary

#12043B

#3B2E04

#123B04

Tetradic

#12043B

#3B0412

#2D3B04

#043B2E

Color Blindness Simulation

Original

#12043B

Protanopia

#0C0C2E

Deuteranopia

#0D0E2A

Tritanopia

#112321

Achromatopsia

#0B0B0B

CSS Usage

background-color: #12043B;
color: #12043B;
border-color: #12043B;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F5F2FD
100
#E7E0FA
200
#CCBCFA
300
#A88CF7
400
#784EF3
500
#4910EF
600
#3A0DBF
700
#2F0A99
800
#240877
900
#1E0A57
950
#130737

Contrast Checker

Text on white

18.98:1

AA Pass AAA Pass

Text on black

1.11:1

AA Fail AAA Fail

Related Articles

Brand Stories

Pantone Colors by Decade: The 2000s, 2010s, and 2020s Compared

Feb 01, 2026
Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026