#3F55CC

#3F55CC

Color Values

HEX

#3F55CC

RGB

63, 85, 204

HSL

230.6, 58.0%, 52.4%

HSV

230.6, 69.1%, 80.0%

CMYK

69.1%, 58.3%, 0.0%, 20.0%

OKLCH

0.5041 0.1852 270.4

Properties

Cool Dark Nearest: royalblue 3

Color Harmonies

Complementary

#3F55CC

#CCB63F

Analogous

#3F9CCC

#703FCC

#3F55CC

Triadic

#3F55CC

#CC3F55

#55CC3F

Split Complementary

#3F55CC

#CC703F

#9CCC3F

Tetradic

#3F55CC

#CC3F9C

#CCB63F

#3FCC70

Color Blindness Simulation

Original

#3F55CC

Protanopia

#4949AF

Deuteranopia

#4746A8

Tritanopia

#409893

Achromatopsia

#595959

CSS Usage

background-color: #3F55CC;
color: #3F55CC;
border-color: #3F55CC;
Nearest Tailwind: Blue 800 #1E40AF

Tailwind Shades

50
#F4F5FB
100
#E4E7F6
200
#C7CDF0
300
#9EA9E5
400
#6A7BD7
500
#364DC9
600
#2B3DA1
700
#223181
800
#1B2665
900
#171F4A
950
#0F142F

Contrast Checker

Text on white

6.21:1

AA Pass AAA Fail

Text on black

3.38:1

AA Fail AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

ม.ค. 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

ม.ค. 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

ม.ค. 15, 2026