#12101F

#12101F

Color Values

HEX

#12101F

RGB

18, 16, 31

HSL

248.0, 31.9%, 9.2%

HSV

248.0, 48.4%, 12.2%

CMYK

41.9%, 48.4%, 0.0%, 87.8%

OKLCH

0.1837 0.0303 289.2

Properties

Cool Dark Nearest: RAL 5011 Steel Blue

Color Harmonies

Complementary

#12101F

#1D1F10

Analogous

#10151F

#19101F

#12101F

Triadic

#12101F

#1F1210

#101F12

Split Complementary

#12101F

#1F1910

#151F10

Tetradic

#12101F

#1F1015

#1D1F10

#101F19

Color Blindness Simulation

Original

#12101F

Protanopia

#11111B

Deuteranopia

#11111A

Tritanopia

#121918

Achromatopsia

#121212

CSS Usage

background-color: #12101F;
color: #12101F;
border-color: #12101F;
Nearest Tailwind: Gray 900 #111827

Tailwind Shades

50
#F6F5F9
100
#EAE8F2
200
#D3D0E7
300
#B3AED5
400
#8B83BF
500
#6257A8
600
#4E4587
700
#3F386C
800
#312B54
900
#26233E
950
#181627

Contrast Checker

Text on white

18.76:1

AA Pass AAA Pass

Text on black

1.12:1

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