#283F5F

#283F5F

Color Values

HEX

#283F5F

RGB

40, 63, 95

HSL

214.9, 40.7%, 26.5%

HSV

214.9, 57.9%, 37.3%

CMYK

57.9%, 33.7%, 0.0%, 62.7%

OKLCH

0.3645 0.0628 256.8

Properties

Cool Dark Nearest: RAL 5000 Violet Blue

Color Harmonies

Complementary

#283F5F

#5F4828

Analogous

#285B5F

#2D285F

#283F5F

Triadic

#283F5F

#5F283F

#3F5F28

Split Complementary

#283F5F

#5F2D28

#5B5F28

Tetradic

#283F5F

#5F285B

#5F4828

#285F2D

Color Blindness Simulation

Original

#283F5F

Protanopia

#323257

Deuteranopia

#312F55

Tritanopia

#295150

Achromatopsia

#3C3C3C

CSS Usage

background-color: #283F5F;
color: #283F5F;
border-color: #283F5F;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F5F7FA
100
#E7ECF3
200
#CDD9EA
300
#A9BEDB
400
#7A9AC7
500
#4C77B3
600
#3C5F90
700
#304C73
800
#263C5A
900
#1F2E42
950
#131D2A

Contrast Checker

Text on white

10.68:1

AA Pass AAA Pass

Text on black

1.97:1

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