#640909

#640909

Color Values

HEX

#640909

RGB

100, 9, 9

HSL

0.0, 83.5%, 21.4%

HSV

0.0, 91.0%, 39.2%

CMYK

0.0%, 91.0%, 91.0%, 60.8%

OKLCH

0.3229 0.1228 27.7

Properties

Warm Dark Nearest: RAL 3011 Brown Red

Color Harmonies

Complementary

#640909

#096464

Analogous

#640937

#643709

#640909

Triadic

#640909

#096409

#090964

Split Complementary

#640909

#096437

#093764

Tetradic

#640909

#376409

#096464

#370964

Color Blindness Simulation

Original

#640909

Protanopia

#3D3C09

Deuteranopia

#424909

Tritanopia

#5F0909

Achromatopsia

#1C1C1C

CSS Usage

background-color: #640909;
color: #640909;
border-color: #640909;
Nearest Tailwind: Red 900 #7F1D1D

Tailwind Shades

50
#FDF2F2
100
#FAE0E0
200
#F9BDBD
300
#F58F8F
400
#EF5252
500
#EA1515
600
#BB1111
700
#960D0D
800
#750B0B
900
#550C0C
950
#360808

Contrast Checker

Text on white

13.25:1

AA Pass AAA Pass

Text on black

1.58:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Feb 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Feb 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Feb 19, 2026