#AD1C21

#AD1C21

Color Values

HEX

#AD1C21

RGB

173, 28, 33

HSL

357.9, 72.1%, 39.4%

HSV

357.9, 83.8%, 67.8%

CMYK

0.0%, 83.8%, 80.9%, 32.2%

OKLCH

0.4832 0.179 25.9

Properties

Warm Dark Nearest: firebrick

Color Harmonies

Complementary

#AD1C21

#1CADA8

Analogous

#AD1C6A

#AD5F1C

#AD1C21

Triadic

#AD1C21

#21AD1C

#1C21AD

Split Complementary

#AD1C21

#1CAD5F

#1C6AAD

Tetradic

#AD1C21

#6AAD1C

#1CADA8

#5F1CAD

Color Blindness Simulation

Original

#AD1C21

Protanopia

#6E6D20

Deuteranopia

#778220

Tritanopia

#A61F1F

Achromatopsia

#3B3B3B

CSS Usage

background-color: #AD1C21;
color: #AD1C21;
border-color: #AD1C21;
Nearest Tailwind: Red 700 #B91C1C

Tailwind Shades

50
#FCF3F3
100
#F8E2E3
200
#F5C2C3
300
#EE9699
400
#E55D61
500
#DB242A
600
#B01C22
700
#8C171B
800
#6E1215
900
#501113
950
#320B0C

Contrast Checker

Text on white

7.08:1

AA Pass AAA Pass

Text on black

2.96:1

AA Fail AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

Jan 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

Jan 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

Jan 15, 2026