#28203B

#28203B

Color Values

HEX

#28203B

RGB

40, 32, 59

HSL

257.8, 29.7%, 17.8%

HSV

257.8, 45.8%, 23.1%

CMYK

32.2%, 45.8%, 0.0%, 76.9%

OKLCH

0.2665 0.0501 296.5

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#28203B

#333B20

Analogous

#20253B

#35203B

#28203B

Triadic

#28203B

#3B2820

#203B28

Split Complementary

#28203B

#3B3520

#253B20

Tetradic

#28203B

#3B2025

#333B20

#203B35

Color Blindness Simulation

Original

#28203B

Protanopia

#252434

Deuteranopia

#252633

Tritanopia

#282F2E

Achromatopsia

#242424

CSS Usage

background-color: #28203B;
color: #28203B;
border-color: #28203B;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F7F5F9
100
#EBE9F2
200
#D7D1E6
300
#BAB0D4
400
#9585BD
500
#705AA5
600
#5A4884
700
#48396A
800
#382D53
900
#2B233D
950
#1B1627

Contrast Checker

Text on white

15.44:1

AA Pass AAA Pass

Text on black

1.36:1

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