#3F4B59

#3F4B59

Color Values

HEX

#3F4B59

RGB

63, 75, 89

HSL

212.3, 17.1%, 29.8%

HSV

212.3, 29.2%, 34.9%

CMYK

29.2%, 15.7%, 0.0%, 65.1%

OKLCH

0.4078 0.0282 252.5

Properties

Cool Dark Nearest: RAL 7015 Slate Grey

Color Harmonies

Complementary

#3F4B59

#594D3F

Analogous

#3F5859

#403F59

#3F4B59

Triadic

#3F4B59

#593F4B

#4B593F

Split Complementary

#3F4B59

#59403F

#58593F

Tetradic

#3F4B59

#593F58

#594D3F

#3F5940

Color Blindness Simulation

Original

#3F4B59

Protanopia

#444456

Deuteranopia

#444355

Tritanopia

#405352

Achromatopsia

#494949

CSS Usage

background-color: #3F4B59;
color: #3F4B59;
border-color: #3F4B59;
Nearest Tailwind: Gray 700 #374151

Tailwind Shades

50
#F6F7F8
100
#EBEDF0
200
#D5DBE1
300
#B7C1CC
400
#919FB1
500
#6A7E95
600
#556577
700
#445160
800
#353F4B
900
#293038
950
#1A1E23

Contrast Checker

Text on white

8.89:1

AA Pass AAA Pass

Text on black

2.36:1

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