#EF0604

#EF0604

Color Values

HEX

#EF0604

RGB

239, 6, 4

HSL

0.5, 96.7%, 47.6%

HSV

0.5, 98.3%, 93.7%

CMYK

0.0%, 97.5%, 98.3%, 6.3%

OKLCH

0.5992 0.2441 29.2

Properties

Warm Light Nearest: red 2

Color Harmonies

Complementary

#EF0604

#04EDEF

Analogous

#EF0477

#EF7B04

#EF0604

Triadic

#EF0604

#04EF06

#0604EF

Split Complementary

#EF0604

#04EF7B

#0477EF

Tetradic

#EF0604

#77EF04

#04EDEF

#7B04EF

Color Blindness Simulation

Original

#EF0604

Protanopia

#8A8804

Deuteranopia

#98A905

Tritanopia

#E30505

Achromatopsia

#373737

CSS Usage

background-color: #EF0604;
color: #EF0604;
border-color: #EF0604;
Nearest Tailwind: Red 600 #DC2626

Tailwind Shades

50
#FEF1F1
100
#FCDFDE
200
#FEB9B9
300
#FD8887
400
#FC4745
500
#FB0604
600
#C90503
700
#A10403
800
#7D0302
900
#5B0706
950
#390404

Contrast Checker

Text on white

4.47:1

AA Fail AAA Fail

Text on black

4.7:1

AA Pass 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