#12031C

#12031C

Color Values

HEX

#12031C

RGB

18, 3, 28

HSL

276.0, 80.6%, 6.1%

HSV

276.0, 89.3%, 11.0%

CMYK

35.7%, 89.3%, 0.0%, 89.0%

OKLCH

0.1477 0.0574 310.3

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#12031C

#0D1C03

Analogous

#06031C

#1C031A

#12031C

Triadic

#12031C

#1C1203

#031C12

Split Complementary

#12031C

#1A1C03

#031C06

Tetradic

#12031C

#1C0603

#0D1C03

#031A1C

Color Blindness Simulation

Original

#12031C

Protanopia

#0C0B16

Deuteranopia

#0C0E14

Tritanopia

#111110

Achromatopsia

#080808

CSS Usage

background-color: #12031C;
color: #12031C;
border-color: #12031C;
Nearest Tailwind: Slate 950 #020617

Tailwind Shades

50
#F8F2FD
100
#F0E1F9
200
#E1BFF8
300
#CC90F3
400
#B055ED
500
#9419E6
600
#7614B8
700
#5F1093
800
#4A0C73
900
#370D54
950
#230835

Contrast Checker

Text on white

19.9:1

AA Pass AAA Pass

Text on black

1.06:1

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