#3F478F

#3F478F

Color Values

HEX

#3F478F

RGB

63, 71, 143

HSL

234,0, 38,8%, 40,4%

HSV

234,0, 55,9%, 56,1%

CMYK

55,9%, 50,3%, 0,0%, 43,9%

OKLCH

0,4298 0,1177 275,5

Properties

Cool Dark Nearest: royalblue 4

Color Harmonies

Complementary

#3F478F

#8F873F

Analogous

#3F6F8F

#5F3F8F

#3F478F

Triadic

#3F478F

#8F3F47

#478F3F

Split Complementary

#3F478F

#8F5F3F

#6F8F3F

Tetradic

#3F478F

#8F3F6F

#8F873F

#3F8F5F

Color Blindness Simulation

Original

#3F478F

Protanopia

#42437E

Deuteranopia

#424179

Tritanopia

#3F706D

Achromatopsia

#4A4A4A

CSS Usage

background-color: #3F478F;
color: #3F478F;
border-color: #3F478F;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F5F5FA
100
#E7E8F3
200
#CDD0E9
300
#AAAFDA
400
#7C83C5
500
#4E58B1
600
#3E468E
700
#323871
800
#272C58
900
#202341
950
#141629

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