#51718A

#51718A

Color Values

HEX

#51718A

RGB

81, 113, 138

HSL

206.3, 26.0%, 42.9%

HSV

206.3, 41.3%, 54.1%

CMYK

41.3%, 18.1%, 0.0%, 45.9%

OKLCH

0.5339 0.054 242.5

Properties

Cool Dark Nearest: skyblue 4

Color Harmonies

Complementary

#51718A

#8A6A51

Analogous

#518A86

#51548A

#51718A

Triadic

#51718A

#8A5171

#718A51

Split Complementary

#51718A

#8A5154

#8A8651

Tetradic

#51718A

#86518A

#8A6A51

#548A51

Color Blindness Simulation

Original

#51718A

Protanopia

#5F5F84

Deuteranopia

#5D5B82

Tritanopia

#537F7E

Achromatopsia

#6C6C6C

CSS Usage

background-color: #51718A;
color: #51718A;
border-color: #51718A;
Nearest Tailwind: Slate 500 #64748B

Tailwind Shades

50
#F6F8F9
100
#E9EEF1
200
#D2DCE5
300
#B2C4D2
400
#88A4B9
500
#5E84A1
600
#4B6981
700
#3C5467
800
#2F4250
900
#25323C
950
#171F26

Contrast Checker

Text on white

5.15:1

AA Pass AAA Fail

Text on black

4.08:1

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