#400304

#400304

Color Values

HEX

#400304

RGB

64, 3, 4

HSL

359.0, 91.0%, 13.1%

HSV

359.0, 95.3%, 25.1%

CMYK

0.0%, 95.3%, 93.8%, 74.9%

OKLCH

0.2377 0.0913 26.9

Properties

Warm Dark Nearest: RAL 8012 Red Brown

Color Harmonies

Complementary

#400304

#03403F

Analogous

#400322

#402003

#400304

Triadic

#400304

#044003

#030440

Split Complementary

#400304

#034020

#032240

Tetradic

#400304

#224003

#03403F

#200340

Color Blindness Simulation

Original

#400304

Protanopia

#262504

Deuteranopia

#292E04

Tritanopia

#3D0404

Achromatopsia

#101010

CSS Usage

background-color: #400304;
color: #400304;
border-color: #400304;
Nearest Tailwind: Red 950 #450A0A

Tailwind Shades

50
#FDF1F2
100
#FBDFE0
200
#FCBBBC
300
#F98A8C
400
#F74B4E
500
#F40B0F
600
#C3090C
700
#9C070A
800
#7A0608
900
#58090A
950
#380606

Contrast Checker

Text on white

17.03:1

AA Pass AAA Pass

Text on black

1.23:1

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