#287780

#287780

Color Values

HEX

#287780

RGB

40, 119, 128

HSL

186.1, 52.4%, 32.9%

HSV

186.1, 68.8%, 50.2%

CMYK

68.8%, 7.0%, 0.0%, 49.8%

OKLCH

0.5258 0.0759 205.9

Properties

Cool Dark Nearest: RAL 5021 Water Blue

Color Harmonies

Complementary

#287780

#803128

Analogous

#28805D

#284B80

#287780

Triadic

#287780

#802877

#778028

Split Complementary

#287780

#80284B

#805D28

Tetradic

#287780

#5D2880

#803128

#4B8028

Color Blindness Simulation

Original

#287780

Protanopia

#4A4B7E

Deuteranopia

#46407D

Tritanopia

#2C7C7C

Achromatopsia

#676767

CSS Usage

background-color: #287780;
color: #287780;
border-color: #287780;
Nearest Tailwind: Cyan 700 #0E7490

Tailwind Shades

50
#F4FAFB
100
#E5F3F5
200
#C9EAEE
300
#A2DBE2
400
#6FC8D2
500
#3DB5C2
600
#31919B
700
#27747C
800
#1E5A61
900
#1A4347
950
#102A2D

Contrast Checker

Text on white

5.2:1

AA Pass AAA Fail

Text on black

4.04:1

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