#3F475F

#3F475F

Color Values

HEX

#3F475F

RGB

63, 71, 95

HSL

225,0, 20,3%, 31,0%

HSV

225,0, 33,7%, 37,3%

CMYK

33,7%, 25,3%, 0,0%, 62,7%

OKLCH

0,4009 0,042 270,2

Properties

Cool Dark Nearest: RAL 7015 Slate Grey

Color Harmonies

Complementary

#3F475F

#5F573F

Analogous

#3F575F

#473F5F

#3F475F

Triadic

#3F475F

#5F3F47

#475F3F

Split Complementary

#3F475F

#5F473F

#575F3F

Tetradic

#3F475F

#5F3F57

#5F573F

#3F5F47

Color Blindness Simulation

Original

#3F475F

Protanopia

#424359

Deuteranopia

#424158

Tritanopia

#3F5554

Achromatopsia

#474747

CSS Usage

background-color: #3F475F;
color: #3F475F;
border-color: #3F475F;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F6F7F9
100
#EAECF0
200
#D4D8E3
300
#B5BCCE
400
#8D97B4
500
#667399
600
#515C7B
700
#414962
800
#33394D
900
#282C39
950
#191C24

Contrast Checker

Text on white

9,22:1

AA Pass AAA Pass

Text on black

2,28:1

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