#288C63

#288C63

Color Values

HEX

#288C63

RGB

40, 140, 99

HSL

155.4, 55.6%, 35.3%

HSV

155.4, 71.4%, 54.9%

CMYK

71.4%, 0.0%, 29.3%, 45.1%

OKLCH

0.5724 0.1113 161.6

Properties

Cool Light Nearest: seagreen

Color Harmonies

Complementary

#288C63

#8C2851

Analogous

#288C31

#28838C

#288C63

Triadic

#288C63

#63288C

#8C6328

Split Complementary

#288C63

#8C2883

#8C3128

Tetradic

#288C63

#31288C

#8C2851

#838C28

Color Blindness Simulation

Original

#288C63

Protanopia

#53546D

Deuteranopia

#4E466F

Tritanopia

#2D7576

Achromatopsia

#747474

CSS Usage

background-color: #288C63;
color: #288C63;
border-color: #288C63;
Nearest Tailwind: Emerald 600 #059669

Tailwind Shades

50
#F4FBF8
100
#E5F6EF
200
#C7EFDF
300
#A0E4C8
400
#6CD5AA
500
#39C68C
600
#2D9F70
700
#247F5A
800
#1C6346
900
#184935
950
#0F2E21

Contrast Checker

Text on white

4.18:1

AA Fail AAA Fail

Text on black

5.02:1

AA Pass 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