#51D0EA#51D0EA

#51D0EA is a light, moderate cyan. Relative luminance 0.528; OKLCH L 79.8% C 0.116 H 213.8°. Best body text is #000000 at 11.56:1 contrast (WCAG AA passes).

Color values

HEX	#51D0EA
RGB	rgb(81, 208, 234)
HSL	hsl(190, 78%, 62%)
HSV	hsv(190, 65%, 92%)
CMYK	cmyk(65.4%, 11.1%, 0%, 8.2%)
CIE-LAB	lab(77.76, -26.96, -23.13)
CIE-LCH	lch(77.76, 35.52, 220.63°)
OKLab	oklab(79.76% -0.0962 -0.0643)
OKLCH	oklch(79.76% 0.116 213.8)
XYZ	xyz(40.7943, 52.7971, 85.8669)
Luminance	0.5280 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51D0EA #EA6B51

analogous

#51EAB8 #51D0EA #5184EA

triadic

#51D0EA #EA51D0 #D0EA51

tetradic

#51D0EA #B851EA #EA6B51 #84EA51

square

#51D0EA #B851EA #EA6B51 #84EA51

split-complementary

#51D0EA #EA5184 #EAB851

monochromatic

#1592AC #1BC1E2 #51D0EA #88DFF1 #BEEEF7

Accessibility & contrast

On white

1.82

#51D0EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.56

#51D0EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51D0EA

11.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51D0EA	#FFFFFF	#000000	##000000
##51D0EA	1.00	1.82	11.56	11.56
#FFFFFF	1.82	1.00	21.00	21.00
#000000	11.56	21.00	1.00	1.00
##000000	11.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BDC9EC

Deuteranopia (green-blind)

#A7B9EA

Tritanopia (blue-blind)

#00DAD8

Achromatopsia (no color)

#C0C0C0

Design tokens & code

CSS

--color: #51d0ea;
/* rgb */ color: rgb(81, 208, 234);
/* oklch */ color: oklch(79.8% 0.116 213.8);

Tailwind

colors: {
  custom: {
    50: '#93def0',
    500: '#51d0ea',
    950: '#000000',
  },
}

SCSS

$custom: #51d0ea;
$custom-light: #93def0;
$custom-dark: #000000;

JSON

{
  "hex": "#51d0ea",
  "rgb": {
    "r": 81,
    "g": 208,
    "b": 234
  },
  "hsl": {
    "h": 190.196,
    "s": 78.462,
    "l": 61.765
  },
  "oklch": {
    "l": 0.79762,
    "c": 0.1157,
    "h": 213.8
  },
  "luminance": 0.52802
}

Semantic roles & 50–950 ramp

primary

#51D0EA

secondary

#AD4732

accent

#2E0BDB

background

#FCFEFF

surface

#F5FCFE

border

#CFD5D6

text

#0E1516

muted

#7F8485

Preview Lab

Preview with #51D0EA

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →