#151C4B

#151C4B

Color Values

HEX

#151C4B

RGB

21, 28, 75

HSL

232.2, 56.3%, 18.8%

HSV

232.2, 72.0%, 29.4%

CMYK

72.0%, 62.7%, 0.0%, 70.6%

OKLCH

0.2522 0.0869 272.2

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#151C4B

#4B4415

Analogous

#15374B

#29154B

#151C4B

Triadic

#151C4B

#4B151C

#1C4B15

Split Complementary

#151C4B

#4B2915

#374B15

Tetradic

#151C4B

#4B1537

#4B4415

#154B29

Color Blindness Simulation

Original

#151C4B

Protanopia

#181840

Deuteranopia

#18173D

Tritanopia

#153735

Achromatopsia

#1E1E1E

CSS Usage

background-color: #151C4B;
color: #151C4B;
border-color: #151C4B;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F4F5FB
100
#E5E7F6
200
#C7CCEF
300
#9FA8E4
400
#6C79D6
500
#384AC7
600
#2D3C9F
700
#243080
800
#1C2564
900
#181E49
950
#0F132E

Contrast Checker

Text on white

16.16:1

AA Pass AAA Pass

Text on black

1.3:1

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