#3F749E

#3F749E

Color Values

HEX

#3F749E

RGB

63, 116, 158

HSL

206.5, 43.0%, 43.3%

HSV

206.5, 60.1%, 62.0%

CMYK

60.1%, 26.6%, 0.0%, 38.0%

OKLCH

0.5407 0.0871 244.3

Properties

Cool Dark Nearest: steelblue 4

Color Harmonies

Complementary

#3F749E

#9E693F

Analogous

#3F9E98

#3F449E

#3F749E

Triadic

#3F749E

#9E3F74

#749E3F

Split Complementary

#3F749E

#9E3F44

#9E983F

Tetradic

#3F749E

#983F9E

#9E693F

#449E3F

Color Blindness Simulation

Original

#3F749E

Protanopia

#565694

Deuteranopia

#534F91

Tritanopia

#428C8A

Achromatopsia

#6C6C6C

CSS Usage

background-color: #3F749E;
color: #3F749E;
border-color: #3F749E;
Nearest Tailwind: Sky 700 #0369A1

Tailwind Shades

50
#F5F8FA
100
#E7EEF4
200
#CCDDEB
300
#A7C5DC
400
#78A5C9
500
#4986B6
600
#3A6B92
700
#2F5675
800
#24435B
900
#1E3343
950
#13202A

Contrast Checker

Text on white

5.0:1

AA Pass AAA Fail

Text on black

4.2:1

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