#3F4B56

#3F4B56

Color Values

HEX

#3F4B56

RGB

63, 75, 86

HSL

208.7, 15.4%, 29.2%

HSV

208.7, 26.7%, 33.7%

CMYK

26.7%, 12.8%, 0.0%, 66.3%

OKLCH

0.4066 0.0241 246.1

Properties

Cool Dark Nearest: RAL 7015 Slate Grey

Color Harmonies

Complementary

#3F4B56

#564A3F

Analogous

#3F5655

#3F3F56

#3F4B56

Triadic

#3F4B56

#563F4B

#4B563F

Split Complementary

#3F4B56

#563F3F

#56553F

Tetradic

#3F4B56

#553F56

#564A3F

#3F563F

Color Blindness Simulation

Original

#3F4B56

Protanopia

#444453

Deuteranopia

#444353

Tritanopia

#405151

Achromatopsia

#494949

CSS Usage

background-color: #3F4B56;
color: #3F4B56;
border-color: #3F4B56;
Nearest Tailwind: Gray 600 #4B5563

Tailwind Shades

50
#F6F7F8
100
#EBEDEF
200
#D6DCE1
300
#B8C2CB
400
#92A1AF
500
#6C8093
600
#566776
700
#45525E
800
#36404A
900
#2A3137
950
#1A1F23

Contrast Checker

Text on white

8.93:1

AA Pass AAA Pass

Text on black

2.35:1

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