#660103

#660103

Color Values

HEX

#660103

RGB

102, 1, 3

HSL

358.8, 98.1%, 20.2%

HSV

358.8, 99.0%, 40.0%

CMYK

0.0%, 99.0%, 97.1%, 60.0%

OKLCH

0.3214 0.1304 28.2

Properties

Warm Dark Nearest: RAL 3011 Brown Red

Color Harmonies

Complementary

#660103

#016664

Analogous

#660136

#663101

#660103

Triadic

#660103

#036601

#010366

Split Complementary

#660103

#016631

#013666

Tetradic

#660103

#366601

#016664

#310166

Color Blindness Simulation

Original

#660103

Protanopia

#3A3903

Deuteranopia

#404802

Tritanopia

#610202

Achromatopsia

#171717

CSS Usage

background-color: #660103;
color: #660103;
border-color: #660103;
Nearest Tailwind: Red 900 #7F1D1D

Tailwind Shades

50
#FEF1F1
100
#FCDEDF
200
#FEB8BA
300
#FE8688
400
#FD4448
500
#FD0207
600
#CA0206
700
#A20205
800
#7E0104
900
#5B0607
950
#3A0405

Contrast Checker

Text on white

13.37:1

AA Pass AAA Pass

Text on black

1.57:1

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