#3F404A

#3F404A

Color Values

HEX

#3F404A

RGB

63, 64, 74

HSL

234.5, 8.0%, 26.9%

HSV

234.5, 14.9%, 29.0%

CMYK

14.9%, 13.5%, 0.0%, 71.0%

OKLCH

0.3744 0.0171 281.0

Properties

Cool Dark Nearest: RAL 7015 Slate Grey

Color Harmonies

Complementary

#3F404A

#4A493F

Analogous

#3F464A

#443F4A

#3F404A

Triadic

#3F404A

#4A3F40

#404A3F

Split Complementary

#3F404A

#4A443F

#464A3F

Tetradic

#3F404A

#4A3F46

#4A493F

#3F4A44

Color Blindness Simulation

Original

#3F404A

Protanopia

#3F3F48

Deuteranopia

#3F3F47

Tritanopia

#3F4645

Achromatopsia

#414141

CSS Usage

background-color: #3F404A;
color: #3F404A;
border-color: #3F404A;
Nearest Tailwind: Zinc 700 #3F3F46

Tailwind Shades

50
#F7F7F8
100
#ECECEE
200
#D8D9DE
300
#BDBEC7
400
#999AA8
500
#75778A
600
#5E5F6E
700
#4B4C58
800
#3B3C45
900
#2D2E34
950
#1C1D21

Contrast Checker

Text on white

10.28:1

AA Pass AAA Pass

Text on black

2.04:1

AA Fail AAA Fail

Related Articles

Brand Stories

Pantone Colors by Decade: The 2000s, 2010s, and 2020s Compared

Feb 01, 2026
Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026