#3F525B

#3F525B

Color Values

HEX

#3F525B

RGB

63, 82, 91

HSL

199,3, 18,2%, 30,2%

HSV

199,3, 30,8%, 35,7%

CMYK

30,8%, 9,9%, 0,0%, 64,3%

OKLCH

0,4262 0,0279 228,5

Properties

Cool Dark Nearest: Outer Space

Color Harmonies

Complementary

#3F525B

#5B483F

Analogous

#3F5B56

#3F445B

#3F525B

Triadic

#3F525B

#5B3F52

#525B3F

Split Complementary

#3F525B

#5B3F44

#5B563F

Tetradic

#3F525B

#563F5B

#5B483F

#445B3F

Color Blindness Simulation

Original

#3F525B

Protanopia

#474759

Deuteranopia

#464558

Tritanopia

#405757

Achromatopsia

#4F4F4F

CSS Usage

background-color: #3F525B;
color: #3F525B;
border-color: #3F525B;
Nearest Tailwind: Gray 600 #4B5563

Tailwind Shades

50
#F6F8F9
100
#EAEEF0
200
#D5DEE2
300
#B7C6CD
400
#8FA7B2
500
#688897
600
#536D79
700
#435760
800
#34444B
900
#293338
950
#1A2024

Contrast Checker

Text on white

8,17:1

AA Pass AAA Pass

Text on black

2,57:1

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