#51818C

#51818C

Color Values

HEX

#51818C

RGB

81, 129, 140

HSL

191.2, 26.7%, 43.3%

HSV

191.2, 42.1%, 54.9%

CMYK

42.1%, 7.9%, 0.0%, 45.1%

OKLCH

0.5732 0.0546 213.8

Properties

Cool Light Nearest: cadetblue 4

Color Harmonies

Complementary

#51818C

#8C5C51

Analogous

#518C79

#51638C

#51818C

Triadic

#51818C

#8C5181

#818C51

Split Complementary

#51818C

#8C5163

#8C7951

Tetradic

#51818C

#79518C

#8C5C51

#638C51

Color Blindness Simulation

Original

#51818C

Protanopia

#666689

Deuteranopia

#635F89

Tritanopia

#538787

Achromatopsia

#787878

CSS Usage

background-color: #51818C;
color: #51818C;
border-color: #51818C;
Nearest Tailwind: Cyan 700 #0E7490

Tailwind Shades

50
#F6F8F9
100
#E9F0F1
200
#D2E1E5
300
#B1CCD2
400
#87B0BA
500
#5D95A2
600
#4B7781
700
#3C5F67
800
#2F4A51
900
#25383C
950
#172326

Contrast Checker

Text on white

4.31:1

AA Fail AAA Fail

Text on black

4.87:1

AA Pass 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