#171228

#171228

Color Values

HEX

#171228

RGB

23, 18, 40

HSL

253.6, 37.9%, 11.4%

HSV

253.6, 55.0%, 15.7%

CMYK

42.5%, 55.0%, 0.0%, 84.3%

OKLCH

0.2009 0.0433 292.5

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#171228

#232812

Analogous

#121828

#221228

#171228

Triadic

#171228

#281712

#122817

Split Complementary

#171228

#282212

#182812

Tetradic

#171228

#281218

#232812

#122822

Color Blindness Simulation

Original

#171228

Protanopia

#151523

Deuteranopia

#151521

Tritanopia

#171E1E

Achromatopsia

#151515

CSS Usage

background-color: #171228;
color: #171228;
border-color: #171228;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F6F5FA
100
#EAE7F3
200
#D4CEE9
300
#B5ABD9
400
#8D7DC4
500
#654FB0
600
#513F8D
700
#413371
800
#332858
900
#272041
950
#191429

Contrast Checker

Text on white

18.2:1

AA Pass AAA Pass

Text on black

1.15:1

AA Fail AAA Fail

Related Articles

Brand Stories

Pantone Colors by Decade: The 2000s, 2010s, and 2020s Compared

Feb 01, 2026
Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026