#CB3737

#CB3737

Color Values

HEX

#CB3737

RGB

203, 55, 55

HSL

0.0, 58.7%, 50.6%

HSV

0.0, 72.9%, 79.6%

CMYK

0.0%, 72.9%, 72.9%, 20.4%

OKLCH

0.5618 0.1852 25.5

Properties

Warm Dark Nearest: RAL 3028 Pure Red

Color Harmonies

Complementary

#CB3737

#37CBCB

Analogous

#CB3781

#CB8137

#CB3737

Triadic

#CB3737

#37CB37

#3737CB

Split Complementary

#CB3737

#37CB81

#3781CB

Tetradic

#CB3737

#81CB37

#37CBCB

#8137CB

Color Blindness Simulation

Original

#CB3737

Protanopia

#8B8A37

Deuteranopia

#949F37

Tritanopia

#C43737

Achromatopsia

#565656

CSS Usage

background-color: #CB3737;
color: #CB3737;
border-color: #CB3737;
Nearest Tailwind: Red 700 #B91C1C

Tailwind Shades

50
#FBF4F4
100
#F6E4E4
200
#F0C6C6
300
#E69E9E
400
#D86969
500
#CA3535
600
#A22A2A
700
#812222
800
#651A1A
900
#4A1717
950
#2F0E0E

Contrast Checker

Text on white

5.07:1

AA Pass AAA Fail

Text on black

4.14:1

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