#3F688F

#3F688F

Color Values

HEX

#3F688F

RGB

63, 104, 143

HSL

209.2, 38.8%, 40.4%

HSV

209.2, 55.9%, 56.1%

CMYK

55.9%, 27.3%, 0.0%, 43.9%

OKLCH

0.5044 0.0778 248.4

Properties

Cool Dark Nearest: steelblue 4

Color Harmonies

Complementary

#3F688F

#8F663F

Analogous

#3F8F8E

#3F408F

#3F688F

Triadic

#3F688F

#8F3F68

#688F3F

Split Complementary

#3F688F

#8F3F40

#8F8E3F

Tetradic

#3F688F

#8E3F8F

#8F663F

#408F3F

Color Blindness Simulation

Original

#3F688F

Protanopia

#515186

Deuteranopia

#4E4B83

Tritanopia

#417E7C

Achromatopsia

#626262

CSS Usage

background-color: #3F688F;
color: #3F688F;
border-color: #3F688F;
Nearest Tailwind: Sky 800 #075985

Tailwind Shades

50
#F5F7FA
100
#E7EDF3
200
#CDDCE9
300
#AAC2DA
400
#7CA2C5
500
#4E81B1
600
#3E678E
700
#325271
800
#274058
900
#203141
950
#141F29

Contrast Checker

Text on white

5.85:1

AA Pass AAA Fail

Text on black

3.59:1

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