#3F439E

#3F439E

Color Values

HEX

#3F439E

RGB

63, 67, 158

HSL

237.5, 43.0%, 43.3%

HSV

237.5, 60.1%, 62.0%

CMYK

60.1%, 57.6%, 0.0%, 38.0%

OKLCH

0.433 0.145 276.6

Properties

Cool Dark Nearest: slateblue 4

Color Harmonies

Complementary

#3F439E

#9E9A3F

Analogous

#3F729E

#6A3F9E

#3F439E

Triadic

#3F439E

#9E3F43

#439E3F

Split Complementary

#3F439E

#9E6A3F

#729E3F

Tetradic

#3F439E

#9E3F72

#9E9A3F

#3F9E6A

Color Blindness Simulation

Original

#3F439E

Protanopia

#414188

Deuteranopia

#404083

Tritanopia

#3F7773

Achromatopsia

#494949

CSS Usage

background-color: #3F439E;
color: #3F439E;
border-color: #3F439E;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F5F5FA
100
#E7E7F4
200
#CCCDEB
300
#A7AADC
400
#787BC9
500
#494DB6
600
#3A3E92
700
#2F3175
800
#24275B
900
#1E1F43
950
#13142A

Contrast Checker

Text on white

8.37:1

AA Pass AAA Pass

Text on black

2.51:1

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