#210305

#210305

Color Values

HEX

#210305

RGB

33, 3, 5

HSL

356.0, 83.3%, 7.1%

HSV

356.0, 90.9%, 12.9%

CMYK

0.0%, 90.9%, 84.8%, 87.1%

OKLCH

0.1654 0.0546 20.0

Properties

Warm Dark Nearest: RAL 5011 Steel Blue

Color Harmonies

Complementary

#210305

#03211F

Analogous

#210314

#211003

#210305

Triadic

#210305

#052103

#030521

Split Complementary

#210305

#032110

#031421

Tetradic

#210305

#142103

#03211F

#100321

Color Blindness Simulation

Original

#210305

Protanopia

#141405

Deuteranopia

#161804

Tritanopia

#1F0404

Achromatopsia

#0A0A0A

CSS Usage

background-color: #210305;
color: #210305;
border-color: #210305;
Nearest Tailwind: Stone 950 #0C0A09

Tailwind Shades

50
#FDF2F3
100
#FAE1E2
200
#F9BEC2
300
#F58F96
400
#EF525D
500
#EA1523
600
#BB111C
700
#960E17
800
#750B12
900
#550C11
950
#36080B

Contrast Checker

Text on white

19.45:1

AA Pass AAA Pass

Text on black

1.08:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Feb 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Feb 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Feb 19, 2026