#1D3F71

#1D3F71

Color Values

HEX

#1D3F71

RGB

29, 63, 113

HSL

215.7, 59.2%, 27.8%

HSV

215.7, 74.3%, 44.3%

CMYK

74.3%, 44.2%, 0.0%, 55.7%

OKLCH

0.3704 0.0949 258.1

Properties

Cool Dark Nearest: RAL 5017 Traffic Blue

Color Harmonies

Complementary

#1D3F71

#714F1D

Analogous

#1D6971

#251D71

#1D3F71

Triadic

#1D3F71

#711D3F

#3F711D

Split Complementary

#1D3F71

#71251D

#69711D

Tetradic

#1D3F71

#711D69

#714F1D

#1D7125

Color Blindness Simulation

Original

#1D3F71

Protanopia

#2C2C65

Deuteranopia

#2A2762

Tritanopia

#1F5B59

Achromatopsia

#3B3B3B

CSS Usage

background-color: #1D3F71;
color: #1D3F71;
border-color: #1D3F71;
Nearest Tailwind: Blue 950 #172554

Tailwind Shades

50
#F4F7FB
100
#E4EBF6
200
#C6D7F0
300
#9EBBE6
400
#6996D9
500
#3471CB
600
#2A5BA2
700
#214882
800
#1A3965
900
#172C4A
950
#0E1C2F

Contrast Checker

Text on white

10.49:1

AA Pass AAA Pass

Text on black

2.0:1

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