#4278B5

#4278B5

Color Values

HEX

#4278B5

RGB

66, 120, 181

HSL

211.8, 46.6%, 48.4%

HSV

211.8, 63.5%, 71.0%

CMYK

63.5%, 33.7%, 0.0%, 29.0%

OKLCH

0.5637 0.1113 252.9

Properties

Cool Light Nearest: RAL 5015 Sky Blue

Color Harmonies

Complementary

#4278B5

#B57F42

Analogous

#42B1B5

#4542B5

#4278B5

Triadic

#4278B5

#B54278

#78B542

Split Complementary

#4278B5

#B54542

#B1B542

Tetradic

#4278B5

#B542B1

#B57F42

#42B545

Color Blindness Simulation

Original

#4278B5

Protanopia

#595AA6

Deuteranopia

#5652A3

Tritanopia

#459B98

Achromatopsia

#717171

CSS Usage

background-color: #4278B5;
color: #4278B5;
border-color: #4278B5;
Nearest Tailwind: Sky 700 #0369A1

Tailwind Shades

50
#F4F7FA
100
#E6EDF4
200
#CBDAEC
300
#A5C0DE
400
#759ECD
500
#447CBB
600
#366396
700
#2C4F78
800
#223E5D
900
#1C2F45
950
#121E2B

Contrast Checker

Text on white

4.58:1

AA Pass AAA Fail

Text on black

4.59:1

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