#121B4B

#121B4B

Color Values

HEX

#121B4B

RGB

18, 27, 75

HSL

230.5, 61.3%, 18.2%

HSV

230.5, 76.0%, 29.4%

CMYK

76.0%, 64.0%, 0.0%, 70.6%

OKLCH

0.2479 0.0894 270.4

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#121B4B

#4B4212

Analogous

#12374B

#25124B

#121B4B

Triadic

#121B4B

#4B121B

#1B4B12

Split Complementary

#121B4B

#4B2512

#374B12

Tetradic

#121B4B

#4B1237

#4B4212

#124B25

Color Blindness Simulation

Original

#121B4B

Protanopia

#16163F

Deuteranopia

#15153D

Tritanopia

#123634

Achromatopsia

#1D1D1D

CSS Usage

background-color: #121B4B;
color: #121B4B;
border-color: #121B4B;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F3F5FB
100
#E4E7F6
200
#C5CCF1
300
#9CA8E7
400
#6779DA
500
#314ACE
600
#273BA5
700
#202F84
800
#192567
900
#161E4B
950
#0E132F

Contrast Checker

Text on white

16.35:1

AA Pass AAA Pass

Text on black

1.28:1

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