#283E55

#283E55

Color Values

HEX

#283E55

RGB

40, 62, 85

HSL

210.7, 36.0%, 24.5%

HSV

210.7, 52.9%, 33.3%

CMYK

52.9%, 27.1%, 0.0%, 66.7%

OKLCH

0.3563 0.0489 250.4

Properties

Cool Dark Nearest: RAL 5020 Ocean Blue

Color Harmonies

Complementary

#283E55

#553F28

Analogous

#285455

#292855

#283E55

Triadic

#283E55

#55283E

#3E5528

Split Complementary

#283E55

#552928

#545528

Tetradic

#283E55

#552854

#553F28

#285529

Color Blindness Simulation

Original

#283E55

Protanopia

#32324F

Deuteranopia

#302F4E

Tritanopia

#294B4A

Achromatopsia

#3B3B3B

CSS Usage

background-color: #283E55;
color: #283E55;
border-color: #283E55;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F5F7FA
100
#E8EDF3
200
#CEDBE8
300
#ACC1D8
400
#7FA0C3
500
#527EAD
600
#41658B
700
#34516F
800
#293F57
900
#213040
950
#151E29

Contrast Checker

Text on white

10.99:1

AA Pass AAA Pass

Text on black

1.91:1

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