#3F647E

#3F647E

Color Values

HEX

#3F647E

RGB

63, 100, 126

HSL

204.8, 33.3%, 37.1%

HSV

204.8, 50.0%, 49.4%

CMYK

50.0%, 20.6%, 0.0%, 50.6%

OKLCH

0.4864 0.0596 240.2

Properties

Cool Dark Nearest: skyblue 4

Color Harmonies

Complementary

#3F647E

#7E593F

Analogous

#3F7E79

#3F457E

#3F647E

Triadic

#3F647E

#7E3F64

#647E3F

Split Complementary

#3F647E

#7E3F45

#7E793F

Tetradic

#3F647E

#793F7E

#7E593F

#457E3F

Color Blindness Simulation

Original

#3F647E

Protanopia

#4F4F78

Deuteranopia

#4D4A76

Tritanopia

#417372

Achromatopsia

#5E5E5E

CSS Usage

background-color: #3F647E;
color: #3F647E;
border-color: #3F647E;
Nearest Tailwind: Cyan 800 #155E75

Tailwind Shades

50
#F5F8FA
100
#E8EEF2
200
#CFDDE7
300
#ADC5D6
400
#81A6C0
500
#5587AA
600
#446C88
700
#36566D
800
#2B4355
900
#22333F
950
#152028

Contrast Checker

Text on white

6.3:1

AA Pass AAA Fail

Text on black

3.34:1

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