#3F73B1

#3F73B1

Color Values

HEX

#3F73B1

RGB

63, 115, 177

HSL

212.6, 47.5%, 47.1%

HSV

212.6, 64.4%, 69.4%

CMYK

64.4%, 35.0%, 0.0%, 30.6%

OKLCH

0.5486 0.1123 254.0

Properties

Cool Dark Nearest: RAL 5015 Sky Blue

Color Harmonies

Complementary

#3F73B1

#B17D3F

Analogous

#3FACB1

#443FB1

#3F73B1

Triadic

#3F73B1

#B13F73

#73B13F

Split Complementary

#3F73B1

#B1443F

#ACB13F

Tetradic

#3F73B1

#B13FAC

#B17D3F

#3FB144

Color Blindness Simulation

Original

#3F73B1

Protanopia

#5656A2

Deuteranopia

#524F9E

Tritanopia

#429694

Achromatopsia

#6C6C6C

CSS Usage

background-color: #3F73B1;
color: #3F73B1;
border-color: #3F73B1;
Nearest Tailwind: Sky 700 #0369A1

Tailwind Shades

50
#F4F7FA
100
#E6EDF4
200
#CADAEC
300
#A5BFDF
400
#749DCD
500
#437ABC
600
#366296
700
#2B4E78
800
#213D5E
900
#1C2F45
950
#121D2C

Contrast Checker

Text on white

4.89:1

AA Pass AAA Fail

Text on black

4.3:1

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