#283E40

#283E40

Color Values

HEX

#283E40

RGB

40, 62, 64

HSL

185.0, 23.1%, 20.4%

HSV

185.0, 37.5%, 25.1%

CMYK

37.5%, 3.1%, 0.0%, 74.9%

OKLCH

0.3464 0.0278 203.1

Properties

Cool Dark Nearest: RAL 6004 Blue Green

Color Harmonies

Complementary

#283E40

#402A28

Analogous

#284036

#283240

#283E40

Triadic

#283E40

#40283E

#3E4028

Split Complementary

#283E40

#402832

#403628

Tetradic

#283E40

#362840

#402A28

#324028

Color Blindness Simulation

Original

#283E40

Protanopia

#323240

Deuteranopia

#302F3F

Tritanopia

#293F3F

Achromatopsia

#393939

CSS Usage

background-color: #283E40;
color: #283E40;
border-color: #283E40;
Nearest Tailwind: Neutral 700 #404040

Tailwind Shades

50
#F6F9F9
100
#EAF0F1
200
#D3E2E4
300
#B4CED0
400
#8BB3B6
500
#62989D
600
#4E7A7E
700
#3F6164
800
#314C4E
900
#26393B
950
#182425

Contrast Checker

Text on white

11.33:1

AA Pass AAA Pass

Text on black

1.85:1

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