#51687D

#51687D

Color Values

HEX

#51687D

RGB

81, 104, 125

HSL

208.6, 21.4%, 40.4%

HSV

208.6, 35.2%, 49.0%

CMYK

35.2%, 16.8%, 0.0%, 51.0%

OKLCH

0.507 0.0434 246.3

Properties

Cool Dark Nearest: skyblue 4

Color Harmonies

Complementary

#51687D

#7D6651

Analogous

#517D7C

#51527D

#51687D

Triadic

#51687D

#7D5168

#687D51

Split Complementary

#51687D

#7D5152

#7D7C51

Tetradic

#51687D

#7C517D

#7D6651

#527D51

Color Blindness Simulation

Original

#51687D

Protanopia

#5B5B78

Deuteranopia

#5A5877

Tritanopia

#527473

Achromatopsia

#656565

CSS Usage

background-color: #51687D;
color: #51687D;
border-color: #51687D;
Nearest Tailwind: Slate 500 #64748B

Tailwind Shades

50
#F6F7F9
100
#EAEDF0
200
#D4DCE3
300
#B5C2CF
400
#8CA2B5
500
#64819B
600
#50677C
700
#405263
800
#32404D
900
#27313A
950
#191F24

Contrast Checker

Text on white

5.79:1

AA Pass AAA Fail

Text on black

3.63:1

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