#283A58

#283A58

Color Values

HEX

#283A58

RGB

40, 58, 88

HSL

217.5, 37.5%, 25.1%

HSV

217.5, 54.5%, 34.5%

CMYK

54.5%, 34.1%, 0.0%, 65.5%

OKLCH

0.3478 0.0578 260.2

Properties

Cool Dark Nearest: RAL 5020 Ocean Blue

Color Harmonies

Complementary

#283A58

#584628

Analogous

#285258

#2E2858

#283A58

Triadic

#283A58

#58283A

#3A5828

Split Complementary

#283A58

#582E28

#525828

Tetradic

#283A58

#582852

#584628

#28582E

Color Blindness Simulation

Original

#283A58

Protanopia

#303051

Deuteranopia

#2F2D4F

Tritanopia

#294B4A

Achromatopsia

#383838

CSS Usage

background-color: #283A58;
color: #283A58;
border-color: #283A58;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F5F7FA
100
#E7ECF3
200
#CED8E9
300
#ABBCD9
400
#7D98C4
500
#5074AF
600
#405C8C
700
#334A70
800
#283A58
900
#202C41
950
#141C29

Contrast Checker

Text on white

11.44:1

AA Pass AAA Pass

Text on black

1.84:1

AA Fail AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

Jan 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

Jan 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

Jan 15, 2026