#021529

#021529

Color Values

HEX

#021529

RGB

2, 21, 41

HSL

210.8, 90.7%, 8.4%

HSV

210.8, 95.1%, 16.1%

CMYK

95.1%, 48.8%, 0.0%, 83.9%

OKLCH

0.1921 0.0487 250.0

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#021529

#291602

Analogous

#022829

#030229

#021529

Triadic

#021529

#290215

#152902

Split Complementary

#021529

#290302

#282902

Tetradic

#021529

#290228

#291602

#022903

Color Blindness Simulation

Original

#021529

Protanopia

#0A0A24

Deuteranopia

#090823

Tritanopia

#032020

Achromatopsia

#121212

CSS Usage

background-color: #021529;
color: #021529;
border-color: #021529;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F1F7FD
100
#DFEDFB
200
#BBDAFC
300
#8AC0F9
400
#4B9EF6
500
#0C7CF3
600
#0964C3
700
#08509C
800
#063E7A
900
#092F58
950
#061E38

Contrast Checker

Text on white

18.39:1

AA Pass AAA Pass

Text on black

1.14:1

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