#641B18

#641B18

Color Values

HEX

#641B18

RGB

100, 27, 24

HSL

2.4, 61.3%, 24.3%

HSV

2.4, 76.0%, 39.2%

CMYK

0.0%, 73.0%, 76.0%, 60.8%

OKLCH

0.3415 0.1055 26.7

Properties

Warm Dark Nearest: RAL 3009 Oxide Red

Color Harmonies

Complementary

#641B18

#186164

Analogous

#64183B

#644118

#641B18

Triadic

#641B18

#18641B

#1B1864

Split Complementary

#641B18

#186441

#183B64

Tetradic

#641B18

#3B6418

#186164

#411864

Color Blindness Simulation

Original

#641B18

Protanopia

#444419

Deuteranopia

#494E19

Tritanopia

#601919

Achromatopsia

#2A2A2A

CSS Usage

background-color: #641B18;
color: #641B18;
border-color: #641B18;
Nearest Tailwind: Red 900 #7F1D1D

Tailwind Shades

50
#FBF4F3
100
#F6E5E4
200
#F1C7C5
300
#E79F9C
400
#DA6B67
500
#CE3831
600
#A52C27
700
#842420
800
#671C19
900
#4B1816
950
#2F0F0E

Contrast Checker

Text on white

12.27:1

AA Pass AAA Pass

Text on black

1.71:1

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