#B5040B

#B5040B

Color Values

HEX

#B5040B

RGB

181, 4, 11

HSL

357.6, 95.7%, 36.3%

HSV

357.6, 97.8%, 71.0%

CMYK

0.0%, 97.8%, 93.9%, 29.0%

OKLCH

0.4871 0.1975 28.2

Properties

Warm Dark Nearest: RAL 2002 Vermilion

Color Harmonies

Complementary

#B5040B

#04B5AE

Analogous

#B50464

#B55504

#B5040B

Triadic

#B5040B

#0BB504

#040BB5

Split Complementary

#B5040B

#04B555

#0464B5

Tetradic

#B5040B

#64B504

#04B5AE

#5504B5

Color Blindness Simulation

Original

#B5040B

Protanopia

#686709

Deuteranopia

#738009

Tritanopia

#AC0808

Achromatopsia

#2A2A2A

CSS Usage

background-color: #B5040B;
color: #B5040B;
border-color: #B5040B;
Nearest Tailwind: Red 700 #B91C1C

Tailwind Shades

50
#FEF1F2
100
#FCDFE0
200
#FDB9BC
300
#FC878C
400
#FB464E
500
#FA050F
600
#C8040C
700
#A0040A
800
#7D0308
900
#5A070A
950
#390406

Contrast Checker

Text on white

7.03:1

AA Pass AAA Pass

Text on black

2.99:1

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