#641B1B

#641B1B

Color Values

HEX

#641B1B

RGB

100, 27, 27

HSL

0.0, 57.5%, 24.9%

HSV

0.0, 73.0%, 39.2%

CMYK

0.0%, 73.0%, 73.0%, 60.8%

OKLCH

0.342 0.105 24.6

Properties

Warm Dark Nearest: RAL 3009 Oxide Red

Color Harmonies

Complementary

#641B1B

#1B6464

Analogous

#641B3F

#643F1B

#641B1B

Triadic

#641B1B

#1B641B

#1B1B64

Split Complementary

#641B1B

#1B643F

#1B3F64

Tetradic

#641B1B

#3F641B

#1B6464

#3F1B64

Color Blindness Simulation

Original

#641B1B

Protanopia

#44441B

Deuteranopia

#494E1B

Tritanopia

#601B1B

Achromatopsia

#2B2B2B

CSS Usage

background-color: #641B1B;
color: #641B1B;
border-color: #641B1B;
Nearest Tailwind: Red 950 #450A0A

Tailwind Shades

50
#FBF4F4
100
#F6E4E4
200
#F0C7C7
300
#E59F9F
400
#D76A6A
500
#C93636
600
#A12B2B
700
#812323
800
#641B1B
900
#4A1717
950
#2E0F0F

Contrast Checker

Text on white

12.25:1

AA Pass AAA Pass

Text on black

1.71:1

AA Fail AAA Fail

Related Articles

Color Questions

What Is Pantone? The Universal Color Language

Feb 20, 2026
Color Questions

What Is Metamerism? Why Colors Look Different Under Different Lights

Feb 20, 2026
Color Questions

What Is Luminance? Brightness in Color Science

Feb 20, 2026