#21303D

#21303D

Color Values

HEX

#21303D

RGB

33, 48, 61

HSL

207.9, 29.8%, 18.4%

HSV

207.9, 45.9%, 23.9%

CMYK

45.9%, 21.3%, 0.0%, 76.1%

OKLCH

0.3018 0.031 245.2

Properties

Cool Dark Nearest: RAL 7026 Granite Grey

Color Harmonies

Complementary

#21303D

#3D2E21

Analogous

#213D3C

#21223D

#21303D

Triadic

#21303D

#3D2130

#303D21

Split Complementary

#21303D

#3D2122

#3D3C21

Tetradic

#21303D

#3C213D

#3D2E21

#223D21

Color Blindness Simulation

Original

#21303D

Protanopia

#27283A

Deuteranopia

#272639

Tritanopia

#223737

Achromatopsia

#2E2E2E

CSS Usage

background-color: #21303D;
color: #21303D;
border-color: #21303D;
Nearest Tailwind: Gray 800 #1F2937

Tailwind Shades

50
#F5F7F9
100
#E9EDF2
200
#D1DCE6
300
#B0C3D4
400
#85A3BD
500
#5A82A5
600
#486884
700
#39536A
800
#2D4153
900
#23313D
950
#161F27

Contrast Checker

Text on white

13.51:1

AA Pass AAA Pass

Text on black

1.55:1

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