#313171

#313171

Color Values

HEX

#313171

RGB

49, 49, 113

HSL

240.0, 39.5%, 31.8%

HSV

240.0, 56.6%, 44.3%

CMYK

56.6%, 56.6%, 0.0%, 55.7%

OKLCH

0.3511 0.1077 279.3

Properties

Cool Dark Nearest: RAL 5005 Signal Blue

Color Harmonies

Complementary

#313171

#717131

Analogous

#315171

#513171

#313171

Triadic

#313171

#713131

#317131

Split Complementary

#313171

#715131

#517131

Tetradic

#313171

#713151

#717131

#317151

Color Blindness Simulation

Original

#313171

Protanopia

#313162

Deuteranopia

#31315E

Tritanopia

#315553

Achromatopsia

#363636

CSS Usage

background-color: #313171;
color: #313171;
border-color: #313171;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F5F5FA
100
#E7E7F3
200
#CDCDE9
300
#AAAADA
400
#7B7BC6
500
#4D4DB2
600
#3E3E8E
700
#313172
800
#272759
900
#1F1F42
950
#141429

Contrast Checker

Text on white

11.61:1

AA Pass AAA Pass

Text on black

1.81:1

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