#B31F1F

#B31F1F

Color Values

HEX

#B31F1F

RGB

179, 31, 31

HSL

0.0, 70.5%, 41.2%

HSV

0.0, 82.7%, 70.2%

CMYK

0.0%, 82.7%, 82.7%, 29.8%

OKLCH

0.4963 0.1829 27.1

Properties

Warm Dark Nearest: firebrick

Color Harmonies

Complementary

#B31F1F

#1FB3B3

Analogous

#B31F69

#B3691F

#B31F1F

Triadic

#B31F1F

#1FB31F

#1F1FB3

Split Complementary

#B31F1F

#1FB369

#1F69B3

Tetradic

#B31F1F

#69B31F

#1FB3B3

#691FB3

Color Blindness Simulation

Original

#B31F1F

Protanopia

#73721F

Deuteranopia

#7C871F

Tritanopia

#AC1F1F

Achromatopsia

#3E3E3E

CSS Usage

background-color: #B31F1F;
color: #B31F1F;
border-color: #B31F1F;
Nearest Tailwind: Red 700 #B91C1C

Tailwind Shades

50
#FCF3F3
100
#F8E2E2
200
#F4C2C2
300
#ED9797
400
#E35E5E
500
#D92626
600
#AE1E1E
700
#8B1818
800
#6D1313
900
#4F1212
950
#320B0B

Contrast Checker

Text on white

6.7:1

AA Pass AAA Fail

Text on black

3.13:1

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