#311B44

#311B44

Color Values

HEX

#311B44

RGB

49, 27, 68

HSL

272.2, 43.2%, 18.6%

HSV

272.2, 60.3%, 26.7%

CMYK

27.9%, 60.3%, 0.0%, 73.3%

OKLCH

0.2732 0.0765 306.8

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#311B44

#2E441B

Analogous

#1C1B44

#441B42

#311B44

Triadic

#311B44

#44311B

#1B4431

Split Complementary

#311B44

#42441B

#1B441C

Tetradic

#311B44

#441C1B

#2E441B

#1B4244

Color Blindness Simulation

Original

#311B44

Protanopia

#27273A

Deuteranopia

#292A38

Tritanopia

#303231

Achromatopsia

#232323

CSS Usage

background-color: #311B44;
color: #311B44;
border-color: #311B44;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F8F5FA
100
#EEE7F4
200
#DCCCEB
300
#C4A7DC
400
#A478C9
500
#8448B7
600
#693A92
700
#542E75
800
#42245B
900
#321E43
950
#1F132A

Contrast Checker

Text on white

15.32:1

AA Pass AAA Pass

Text on black

1.37:1

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