#51C8DA

#51C8DA

Color Values

HEX

#51C8DA

RGB

81, 200, 218

HSL

187.9, 64.9%, 58.6%

HSV

187.9, 62.8%, 85.5%

CMYK

62.8%, 8.3%, 0.0%, 14.5%

OKLCH

0.7729 0.1079 209.0

Properties

Cool Light Nearest: NCS S 0530-B40G Aqua

Color Harmonies

Complementary

#51C8DA

#DA6351

Analogous

#51DAA7

#5183DA

#51C8DA

Triadic

#51C8DA

#DA51C8

#C8DA51

Split Complementary

#51C8DA

#DA5183

#DAA751

Tetradic

#51C8DA

#A751DA

#DA6351

#83DA51

Color Blindness Simulation

Original

#51C8DA

Protanopia

#8586D6

Deuteranopia

#7E75D5

Tritanopia

#57D2D1

Achromatopsia

#B0B0B0

CSS Usage

background-color: #51C8DA;
color: #51C8DA;
border-color: #51C8DA;
Nearest Tailwind: Cyan 400 #22D3EE

Tailwind Shades

50
#F3FAFC
100
#E3F4F7
200
#C4ECF2
300
#9ADFEA
400
#63CEDE
500
#2DBCD2
600
#2497A8
700
#1D7987
800
#165E69
900
#14454D
950
#0D2C30

Contrast Checker

Text on white

1.98:1

AA Fail AAA Fail

Text on black

10.62:1

AA Pass AAA Pass

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