#51C4EA#51C4EA

#51C4EA is a light, moderate cyan. Relative luminance 0.472; OKLCH L 77.0% C 0.116 H 223.3°. Best body text is #000000 at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#51C4EA
RGB	rgb(81, 196, 234)
HSL	hsl(195, 78%, 62%)
HSV	hsv(195, 65%, 92%)
CMYK	cmyk(65.4%, 16.2%, 0%, 8.2%)
CIE-LAB	lab(74.30, -20.93, -28.42)
CIE-LCH	lch(74.30, 35.30, 233.63°)
OKLab	oklab(76.99% -0.0842 -0.0793)
OKLCH	oklch(76.99% 0.116 223.3)
XYZ	xyz(37.9786, 47.1656, 84.9283)
Luminance	0.4717 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C4EA #EA7751

analogous

#51EAC4 #51C4EA #5178EA

triadic

#51C4EA #EA51C4 #C4EA51

tetradic

#51C4EA #C451EA #EA7751 #78EA51

square

#51C4EA #C451EA #EA7751 #78EA51

split-complementary

#51C4EA #EA5178 #EAC451

monochromatic

#1586AC #1BB1E2 #51C4EA #88D7F1 #BEE9F7

Accessibility & contrast

On white

2.01

#51C4EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.43

#51C4EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C4EA

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C4EA	#FFFFFF	#000000	##000000
##51C4EA	1.00	2.01	10.43	10.43
#FFFFFF	2.01	1.00	21.00	21.00
#000000	10.43	21.00	1.00	1.00
##000000	10.43	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AEC0EC

Deuteranopia (green-blind)

#99B0EA

Tritanopia (blue-blind)

#00D0D0

Achromatopsia (no color)

#B7B7B7

Design tokens & code

CSS

--color: #51c4ea;
/* rgb */ color: rgb(81, 196, 234);
/* oklch */ color: oklch(77.0% 0.116 223.3);

Tailwind

colors: {
  custom: {
    50: '#92d6f0',
    500: '#51c4ea',
    950: '#000000',
  },
}

SCSS

$custom: #51c4ea;
$custom-light: #92d6f0;
$custom-dark: #000000;

JSON

{
  "hex": "#51c4ea",
  "rgb": {
    "r": 81,
    "g": 196,
    "b": 234
  },
  "hsl": {
    "h": 194.902,
    "s": 78.462,
    "l": 61.765
  },
  "oklch": {
    "l": 0.76987,
    "c": 0.11565,
    "h": 223.3
  },
  "luminance": 0.4717
}

Semantic roles & 50–950 ramp

primary

#51C4EA

secondary

#E8BDAF

accent

#3E0BDB

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C4EA

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

Preview Lab → · Contrast checker → · Palette generator →