#B51515

#B51515

Color Values

HEX

#B51515

RGB

181, 21, 21

HSL

0.0, 79.2%, 39.6%

HSV

0.0, 88.4%, 71.0%

CMYK

0.0%, 88.4%, 88.4%, 29.0%

OKLCH

0.4935 0.1911 28.0

Properties

Warm Dark Nearest: RAL 2002 Vermilion

Color Harmonies

Complementary

#B51515

#15B5B5

Analogous

#B51565

#B56515

#B51515

Triadic

#B51515

#15B515

#1515B5

Split Complementary

#B51515

#15B565

#1565B5

Tetradic

#B51515

#65B515

#15B5B5

#6515B5

Color Blindness Simulation

Original

#B51515

Protanopia

#706E15

Deuteranopia

#798515

Tritanopia

#AD1515

Achromatopsia

#373737

CSS Usage

background-color: #B51515;
color: #B51515;
border-color: #B51515;
Nearest Tailwind: Red 700 #B91C1C

Tailwind Shades

50
#FCF2F2
100
#F9E1E1
200
#F8BFBF
300
#F29191
400
#EB5656
500
#E41B1B
600
#B71515
700
#921111
800
#720D0D
900
#530E0E
950
#340909

Contrast Checker

Text on white

6.81:1

AA Pass AAA Fail

Text on black

3.08:1

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