#51BEE8#51BEE8

#51BEE8 is a light, moderate cyan. Relative luminance 0.444; OKLCH L 75.5% C 0.115 H 226.9°. Best body text is #000000 at 9.88:1 contrast (WCAG AA passes).

Color values

HEX#51BEE8
RGBrgb(81, 190, 232)
HSLhsl(197, 77%, 61%)
HSVhsv(197, 65%, 91%)
CMYKcmyk(65.1%, 18.1%, 0%, 9%)
CIE-LABlab(72.49, -18.45, -30.11)
CIE-LCHlch(72.49, 35.31, 238.50°)
OKLaboklab(75.52% -0.0788 -0.0842)
OKLCHoklch(75.52% 0.115 226.9)
XYZxyz(36.3665, 44.3986, 82.9815)
Luminance0.4440 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51BEE8 #E87B51
analogous
#51E8C7 #51BEE8 #5173E8
triadic
#51BEE8 #E851BE #BEE851
tetradic
#51BEE8 #C751E8 #E87B51 #73E851
square
#51BEE8 #C751E8 #E87B51 #73E851
split-complementary
#51BEE8 #E85173 #E8C751
monochromatic
#1680A8 #1DA9DE #51BEE8 #87D2EF #BDE6F6

Accessibility & contrast

On white

2.13
#51BEE8 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.88
#51BEE8 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BEE8
9.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51BEE8#FFFFFF#000000##000000
##51BEE81.002.139.889.88
#FFFFFF2.131.0021.0021.00
#0000009.8821.001.001.00
##0000009.8821.001.001.00

Color blindness preview

Protanopia (red-blind)
#A8BBEA
Deuteranopia (green-blind)
#92ABE7
Tritanopia (blue-blind)
#00CACC
Achromatopsia (no color)
#B2B2B2

Design tokens & code

CSS
--color: #51bee8;
/* rgb */ color: rgb(81, 190, 232);
/* oklch */ color: oklch(75.5% 0.115 226.9);
Tailwind
colors: {
  custom: {
    50: '#91d1ef',
    500: '#51bee8',
    950: '#000000',
  },
}
SCSS
$custom: #51bee8;
$custom-light: #91d1ef;
$custom-dark: #000000;
JSON
{
  "hex": "#51bee8",
  "rgb": {
    "r": 81,
    "g": 190,
    "b": 232
  },
  "hsl": {
    "h": 196.689,
    "s": 76.65,
    "l": 61.373
  },
  "oklch": {
    "l": 0.75522,
    "c": 0.11533,
    "h": 226.9
  },
  "luminance": 0.44402
}

Semantic roles & 50–950 ramp

primary
#51BEE8
secondary
#E7BEAE
accent
#450DD9
background
#F9FCFE
surface
#F2F9FD
border
#CCD2D5
text
#0E1416
muted
#7E8284

Preview Lab

Preview with #51BEE8

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

Preview Lab → · Contrast checker → · Palette generator →

#51BEE8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva