#AD3731

#AD3731

Color Values

HEX

#AD3731

RGB

173, 55, 49

HSL

2.9, 55.9%, 43.5%

HSV

2.9, 71.7%, 67.8%

CMYK

0.0%, 68.2%, 71.7%, 32.2%

OKLCH

0.5093 0.1549 27.0

Properties

Warm Dark Nearest: NCS S 2060-R Deep Red

Color Harmonies

Complementary

#AD3731

#31A7AD

Analogous

#AD3169

#AD7531

#AD3731

Triadic

#AD3731

#31AD37

#3731AD

Split Complementary

#AD3731

#31AD75

#3169AD

Tetradic

#AD3731

#69AD31

#31A7AD

#7531AD

Color Blindness Simulation

Original

#AD3731

Protanopia

#7A7932

Deuteranopia

#818A33

Tritanopia

#A73434

Achromatopsia

#505050

CSS Usage

background-color: #AD3731;
color: #AD3731;
border-color: #AD3731;
Nearest Tailwind: Red 800 #991B1B

Tailwind Shades

50
#FBF4F4
100
#F6E5E5
200
#EFC9C7
300
#E4A3A0
400
#D5716C
500
#C73F38
600
#9F322D
700
#7F2824
800
#63201C
900
#491A18
950
#2E110F

Contrast Checker

Text on white

6.24:1

AA Pass AAA Fail

Text on black

3.37:1

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