#3F515B

#3F515B

Color Values

HEX

#3F515B

RGB

63, 81, 91

HSL

201.4, 18.2%, 30.2%

HSV

201.4, 30.8%, 35.7%

CMYK

30.8%, 11.0%, 0.0%, 64.3%

OKLCH

0.4237 0.0279 232.6

Properties

Cool Dark Nearest: RAL 7024 Graphite Grey

Color Harmonies

Complementary

#3F515B

#5B493F

Analogous

#3F5B57

#3F435B

#3F515B

Triadic

#3F515B

#5B3F51

#515B3F

Split Complementary

#3F515B

#5B3F43

#5B573F

Tetradic

#3F515B

#573F5B

#5B493F

#435B3F

Color Blindness Simulation

Original

#3F515B

Protanopia

#474759

Deuteranopia

#464458

Tritanopia

#405756

Achromatopsia

#4E4E4E

CSS Usage

background-color: #3F515B;
color: #3F515B;
border-color: #3F515B;
Nearest Tailwind: Gray 600 #4B5563

Tailwind Shades

50
#F6F8F9
100
#EAEEF0
200
#D5DDE2
300
#B7C5CD
400
#8FA6B2
500
#688697
600
#536B79
700
#435660
800
#34434B
900
#293338
950
#1A2024

Contrast Checker

Text on white

8.27:1

AA Pass AAA Pass

Text on black

2.54:1

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