#284D71

#284D71

Color Values

HEX

#284D71

RGB

40, 77, 113

HSL

209.6, 47.7%, 30.0%

HSV

209.6, 64.6%, 44.3%

CMYK

64.6%, 31.9%, 0.0%, 55.7%

OKLCH

0.4103 0.0742 249.5

Properties

Cool Dark Nearest: RAL 5000 Violet Blue

Color Harmonies

Complementary

#284D71

#714C28

Analogous

#287171

#282871

#284D71

Triadic

#284D71

#71284D

#4D7128

Split Complementary

#284D71

#712828

#717128

Tetradic

#284D71

#712871

#714C28

#287128

Color Blindness Simulation

Original

#284D71

Protanopia

#383868

Deuteranopia

#363366

Tritanopia

#2A6160

Achromatopsia

#484848

CSS Usage

background-color: #284D71;
color: #284D71;
border-color: #284D71;
Nearest Tailwind: Sky 900 #0C4A6E

Tailwind Shades

50
#F4F7FA
100
#E6EDF4
200
#CADCEC
300
#A5C2DF
400
#74A1CE
500
#4380BC
600
#356797
700
#2B5279
800
#21405E
900
#1C3145
950
#111F2C

Contrast Checker

Text on white

8.79:1

AA Pass AAA Pass

Text on black

2.39:1

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