#12102B

#12102B

Color Values

HEX

#12102B

RGB

18, 16, 43

HSL

244.4, 45.8%, 11.6%

HSV

244.4, 62.8%, 16.9%

CMYK

58.1%, 62.8%, 0.0%, 83.1%

OKLCH

0.1929 0.0529 283.6

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#12102B

#292B10

Analogous

#101C2B

#20102B

#12102B

Triadic

#12102B

#2B1210

#102B12

Split Complementary

#12102B

#2B2010

#1C2B10

Tetradic

#12102B

#2B101C

#292B10

#102B20

Color Blindness Simulation

Original

#12102B

Protanopia

#111124

Deuteranopia

#111123

Tritanopia

#121F1E

Achromatopsia

#121212

CSS Usage

background-color: #12102B;
color: #12102B;
border-color: #12102B;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F5F4FA
100
#E7E6F4
200
#CDCBEC
300
#AAA6DE
400
#7C75CC
500
#4E45BA
600
#3E3795
700
#322C77
800
#27235D
900
#1F1C44
950
#14122B

Contrast Checker

Text on white

18.51:1

AA Pass AAA Pass

Text on black

1.13:1

AA Fail AAA Fail

Related Articles

Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026
Tutorials

How to Choose Brand Colors: A Step-by-Step Guide

Jan 18, 2026