#281837

#281837

Color Values

HEX

#281837

RGB

40, 24, 55

HSL

271.0, 39.2%, 15.5%

HSV

271.0, 56.4%, 21.6%

CMYK

27.3%, 56.4%, 0.0%, 78.4%

OKLCH

0.2463 0.06 306.3

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#281837

#273718

Analogous

#191837

#371837

#281837

Triadic

#281837

#372818

#183728

Split Complementary

#281837

#373718

#183719

Tetradic

#281837

#371918

#273718

#183737

Color Blindness Simulation

Original

#281837

Protanopia

#212130

Deuteranopia

#22232E

Tritanopia

#272A28

Achromatopsia

#1E1E1E

CSS Usage

background-color: #281837;
color: #281837;
border-color: #281837;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F7F5FA
100
#EDE7F3
200
#DCCDE9
300
#C3AADA
400
#A27CC6
500
#814EB1
600
#673E8E
700
#533272
800
#412759
900
#311F42
950
#1F1429

Contrast Checker

Text on white

16.46:1

AA Pass AAA Pass

Text on black

1.28:1

AA Fail AAA Fail

Related Articles

Brand Stories

Pantone Colors by Decade: The 2000s, 2010s, and 2020s Compared

Feb 01, 2026
Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026