#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
RGBrgb(81, 196, 234)
HSLhsl(195, 78%, 62%)
HSVhsv(195, 65%, 92%)
CMYKcmyk(65.4%, 16.2%, 0%, 8.2%)
CIE-LABlab(74.30, -20.93, -28.42)
CIE-LCHlch(74.30, 35.30, 233.63°)
OKLaboklab(76.99% -0.0842 -0.0793)
OKLCHoklch(76.99% 0.116 223.3)
XYZxyz(37.9786, 47.1656, 84.9283)
Luminance0.4717 (WCAG relative)
Temperaturecool
Familycyan

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
##51C4EA1.002.0110.4310.43
#FFFFFF2.011.0021.0021.00
#00000010.4321.001.001.00
##00000010.4321.001.001.00

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 →

#51C4EA Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva