#3F55B2

#3F55B2

Color Values

HEX

#3F55B2

RGB

63, 85, 178

HSL

228.5, 47.7%, 47.3%

HSV

228.5, 64.6%, 69.8%

CMYK

64.6%, 52.2%, 0.0%, 30.2%

OKLCH

0.4839 0.1496 270.0

Properties

Cool Dark Nearest: NCS S 1050-R90B Blue Violet

Color Harmonies

Complementary

#3F55B2

#B29C3F

Analogous

#3F8FB2

#633FB2

#3F55B2

Triadic

#3F55B2

#B23F55

#55B23F

Split Complementary

#3F55B2

#B2633F

#8FB23F

Tetradic

#3F55B2

#B23F8F

#B29C3F

#3FB263

Color Blindness Simulation

Original

#3F55B2

Protanopia

#49499C

Deuteranopia

#474696

Tritanopia

#408A86

Achromatopsia

#575757

CSS Usage

background-color: #3F55B2;
color: #3F55B2;
border-color: #3F55B2;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F4F5FA
100
#E6E9F4
200
#CAD1EC
300
#A5B0DF
400
#7485CE
500
#435ABC
600
#354897
700
#2B3A79
800
#212D5E
900
#1C2445
950
#11162C

Contrast Checker

Text on white

6.66:1

AA Pass AAA Fail

Text on black

3.15:1

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