#12171C

#12171C

Color Values

HEX

#12171C

RGB

18, 23, 28

HSL

210.0, 21.7%, 9.0%

HSV

210.0, 35.7%, 11.0%

CMYK

35.7%, 17.9%, 0.0%, 89.0%

OKLCH

0.2017 0.0126 248.5

Properties

Cool Dark Nearest: RAL 5004 Black Blue

Color Harmonies

Complementary

#12171C

#1C1712

Analogous

#121C1C

#12121C

#12171C

Triadic

#12171C

#1C1217

#171C12

Split Complementary

#12171C

#1C1212

#1C1C12

Tetradic

#12171C

#1C121C

#1C1712

#121C12

Color Blindness Simulation

Original

#12171C

Protanopia

#14141B

Deuteranopia

#14141A

Tritanopia

#121A1A

Achromatopsia

#161616

CSS Usage

background-color: #12171C;
color: #12171C;
border-color: #12171C;
Nearest Tailwind: Zinc 900 #18181B

Tailwind Shades

50
#F6F7F9
100
#EAEDF0
200
#D4DBE3
300
#B5C2CF
400
#8CA1B5
500
#64809B
600
#50667C
700
#405263
800
#32404E
900
#27303A
950
#191F25

Contrast Checker

Text on white

18.03:1

AA Pass AAA Pass

Text on black

1.17:1

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