#51D2EC#51D2EC

#51D2EC is a light, moderate cyan. Relative luminance 0.539; OKLCH L 80.3% C 0.117 H 213.5°. Best body text is #000000 at 11.78:1 contrast (WCAG AA passes).

Color values

HEX	#51D2EC
RGB	rgb(81, 210, 236)
HSL	hsl(190, 80%, 62%)
HSV	hsv(190, 66%, 93%)
CMYK	cmyk(65.7%, 11%, 0%, 7.5%)
CIE-LAB	lab(78.40, -27.35, -23.22)
CIE-LCH	lch(78.40, 35.88, 220.33°)
OKLab	oklab(80.3% -0.0974 -0.0646)
OKLCH	oklch(80.3% 0.117 213.5)
XYZ	xyz(41.5739, 53.8941, 87.5522)
Luminance	0.5390 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51D2EC #EC6B51

analogous

#51ECB9 #51D2EC #5184EC

triadic

#51D2EC #EC51D2 #D2EC51

tetradic

#51D2EC #B951EC #EC6B51 #84EC51

square

#51D2EC #B951EC #EC6B51 #84EC51

split-complementary

#51D2EC #EC5184 #ECB951

monochromatic

#1395AF #1AC4E6 #51D2EC #88E0F2 #BFEFF8

Accessibility & contrast

On white

1.78

#51D2EC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.78

#51D2EC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51D2EC

11.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51D2EC	#FFFFFF	#000000	##000000
##51D2EC	1.00	1.78	11.78	11.78
#FFFFFF	1.78	1.00	21.00	21.00
#000000	11.78	21.00	1.00	1.00
##000000	11.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BFCBEE

Deuteranopia (green-blind)

#A8BBEC

Tritanopia (blue-blind)

#00DCDA

Achromatopsia (no color)

#C2C2C2

Design tokens & code

CSS

--color: #51d2ec;
/* rgb */ color: rgb(81, 210, 236);
/* oklch */ color: oklch(80.3% 0.117 213.5);

Tailwind

colors: {
  custom: {
    50: '#93e0f2',
    500: '#51d2ec',
    950: '#000000',
  },
}

SCSS

$custom: #51d2ec;
$custom-light: #93e0f2;
$custom-dark: #000000;

JSON

{
  "hex": "#51d2ec",
  "rgb": {
    "r": 81,
    "g": 210,
    "b": 236
  },
  "hsl": {
    "h": 190.065,
    "s": 80.311,
    "l": 62.157
  },
  "oklch": {
    "l": 0.80304,
    "c": 0.11684,
    "h": 213.5
  },
  "luminance": 0.53899
}

Semantic roles & 50–950 ramp

primary

#51D2EC

secondary

#B04731

accent

#2C09DD

background

#FCFEFF

surface

#F5FCFE

border

#CFD5D6

text

#0E1516

muted

#7F8485

Preview Lab

Preview with #51D2EC

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

Preview Lab → · Contrast checker → · Palette generator →