#281537

#281537

Color Values

HEX

#281537

RGB

40, 21, 55

HSL

273.5, 44.7%, 14.9%

HSV

273.5, 61.8%, 21.6%

CMYK

27.3%, 61.8%, 0.0%, 78.4%

OKLCH

0.2403 0.0661 308.0

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#281537

#243715

Analogous

#171537

#371535

#281537

Triadic

#281537

#372815

#153728

Split Complementary

#281537

#353715

#153717

Tetradic

#281537

#371715

#243715

#153537

Color Blindness Simulation

Original

#281537

Protanopia

#20202F

Deuteranopia

#21222D

Tritanopia

#272827

Achromatopsia

#1B1B1B

CSS Usage

background-color: #281537;
color: #281537;
border-color: #281537;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F8F4FA
100
#EEE6F4
200
#DDCBEB
300
#C5A6DD
400
#A676CB
500
#8647B8
600
#6B3894
700
#562D76
800
#43235C
900
#331D44
950
#20122B

Contrast Checker

Text on white

16.76:1

AA Pass AAA Pass

Text on black

1.25:1

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