#A31C01

#A31C01

Color Values

HEX

#A31C01

RGB

163, 28, 1

HSL

10.0, 98.8%, 32.2%

HSV

10.0, 99.4%, 63.9%

CMYK

0.0%, 82.8%, 99.4%, 36.1%

OKLCH

0.4619 0.1727 32.3

Properties

Warm Dark Nearest: RAL 3013 Tomato Red

Color Harmonies

Complementary

#A31C01

#0188A3

Analogous

#A30137

#A36D01

#A31C01

Triadic

#A31C01

#01A31C

#1C01A3

Split Complementary

#A31C01

#01A36D

#0137A3

Tetradic

#A31C01

#37A301

#0188A3

#6D01A3

Color Blindness Simulation

Original

#A31C01

Protanopia

#696708

Deuteranopia

#707A09

Tritanopia

#9C0D0E

Achromatopsia

#373737

CSS Usage

background-color: #A31C01;
color: #A31C01;
border-color: #A31C01;
Nearest Tailwind: Red 700 #B91C1C

Tailwind Shades

50
#FEF3F1
100
#FCE3DE
200
#FFC4B8
300
#FE9985
400
#FE6343
500
#FD2C02
600
#CB2301
700
#A21C01
800
#7F1601
900
#5C1405
950
#3A0C03

Contrast Checker

Text on white

7.71:1

AA Pass AAA Pass

Text on black

2.72:1

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