#3F45B0

#3F45B0

Color Values

HEX

#3F45B0

RGB

63, 69, 176

HSL

236.8, 47.3%, 46.9%

HSV

236.8, 64.2%, 69.0%

CMYK

64.2%, 60.8%, 0.0%, 31.0%

OKLCH

0.4514 0.1674 275.0

Properties

Cool Dark Nearest: NCS S 2050-R70B Violet

Color Harmonies

Complementary

#3F45B0

#B0AA3F

Analogous

#3F7EB0

#723FB0

#3F45B0

Triadic

#3F45B0

#B03F45

#45B03F

Split Complementary

#3F45B0

#B0723F

#7EB03F

Tetradic

#3F45B0

#B03F7E

#B0AA3F

#3FB072

Color Blindness Simulation

Original

#3F45B0

Protanopia

#424296

Deuteranopia

#414190

Tritanopia

#3F827D

Achromatopsia

#4B4B4B

CSS Usage

background-color: #3F45B0;
color: #3F45B0;
border-color: #3F45B0;
Nearest Tailwind: Blue 800 #1E40AF

Tailwind Shades

50
#F4F5FA
100
#E6E7F4
200
#CACCEC
300
#A5A8DF
400
#7479CD
500
#434ABC
600
#363B96
700
#2B2F78
800
#22255E
900
#1C1E45
950
#12132C

Contrast Checker

Text on white

7.81:1

AA Pass AAA Pass

Text on black

2.69:1

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