#040A3D

#040A3D

Color Values

HEX

#040A3D

RGB

4, 10, 61

HSL

233.7, 87.7%, 12.7%

HSV

233.7, 93.4%, 23.9%

CMYK

93.4%, 83.6%, 0.0%, 76.1%

OKLCH

0.1877 0.096 267.6

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#040A3D

#3D3704

Analogous

#04263D

#1A043D

#040A3D

Triadic

#040A3D

#3D040A

#0A3D04

Split Complementary

#040A3D

#3D1A04

#263D04

Tetradic

#040A3D

#3D0426

#3D3704

#043D1A

Color Blindness Simulation

Original

#040A3D

Protanopia

#070731

Deuteranopia

#06062E

Tritanopia

#042725

Achromatopsia

#0C0C0C

CSS Usage

background-color: #040A3D;
color: #040A3D;
border-color: #040A3D;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F2F3FD
100
#E0E3FA
200
#BCC3FB
300
#8C97F7
400
#4E5FF3
500
#1027EF
600
#0D1FBF
700
#0A1999
800
#081478
900
#0A1257
950
#060C37

Contrast Checker

Text on white

18.82:1

AA Pass AAA Pass

Text on black

1.12:1

AA Fail AAA Fail

Related Articles

Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026
Tutorials

How to Choose Brand Colors: A Step-by-Step Guide

Jan 18, 2026