#3F4F60

#3F4F60

Color Values

HEX

#3F4F60

RGB

63, 79, 96

HSL

210.9, 20.8%, 31.2%

HSV

210.9, 34.4%, 37.6%

CMYK

34.4%, 17.7%, 0.0%, 62.4%

OKLCH

0.4208 0.0349 250.2

Properties

Cool Dark Nearest: RAL 7015 Slate Grey

Color Harmonies

Complementary

#3F4F60

#60503F

Analogous

#3F6060

#403F60

#3F4F60

Triadic

#3F4F60

#603F4F

#4F603F

Split Complementary

#3F4F60

#60403F

#60603F

Tetradic

#3F4F60

#603F60

#60503F

#3F6040

Color Blindness Simulation

Original

#3F4F60

Protanopia

#46465C

Deuteranopia

#45445B

Tritanopia

#405958

Achromatopsia

#4D4D4D

CSS Usage

background-color: #3F4F60;
color: #3F4F60;
border-color: #3F4F60;
Nearest Tailwind: Slate 600 #475569

Tailwind Shades

50
#F6F7F9
100
#EAEDF0
200
#D4DBE3
300
#B5C1CF
400
#8DA0B4
500
#657F9A
600
#51657B
700
#415163
800
#323F4D
900
#27303A
950
#191E24

Contrast Checker

Text on white

8.4:1

AA Pass AAA Pass

Text on black

2.5:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Feb 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Feb 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Feb 19, 2026