#51C0EA#51C0EA

#51C0EA is a light, moderate cyan. Relative luminance 0.454; OKLCH L 76.1% C 0.116 H 226.5°. Best body text is #000000 at 10.08:1 contrast (WCAG AA passes).

Color values

HEX#51C0EA
RGBrgb(81, 192, 234)
HSLhsl(196, 78%, 62%)
HSVhsv(196, 65%, 92%)
CMYKcmyk(65.4%, 17.9%, 0%, 8.2%)
CIE-LABlab(73.14, -18.87, -30.19)
CIE-LCHlch(73.14, 35.60, 237.99°)
OKLaboklab(76.07% -0.0801 -0.0844)
OKLCHoklch(76.07% 0.116 226.5)
XYZxyz(37.0883, 45.3851, 84.6315)
Luminance0.4539 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51C0EA #EA7B51
analogous
#51EAC8 #51C0EA #5173EA
triadic
#51C0EA #EA51C0 #C0EA51
tetradic
#51C0EA #C851EA #EA7B51 #73EA51
square
#51C0EA #C851EA #EA7B51 #73EA51
split-complementary
#51C0EA #EA5173 #EAC851
monochromatic
#1582AC #1BACE2 #51C0EA #88D4F1 #BEE8F7

Accessibility & contrast

On white

2.08
#51C0EA on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

10.08
#51C0EA on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C0EA
10.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51C0EA#FFFFFF#000000##000000
##51C0EA1.002.0810.0810.08
#FFFFFF2.081.0021.0021.00
#00000010.0821.001.001.00
##00000010.0821.001.001.00

Color blindness preview

Protanopia (red-blind)
#A9BCEC
Deuteranopia (green-blind)
#94ADEA
Tritanopia (blue-blind)
#00CCCE
Achromatopsia (no color)
#B4B4B4

Design tokens & code

CSS
--color: #51c0ea;
/* rgb */ color: rgb(81, 192, 234);
/* oklch */ color: oklch(76.1% 0.116 226.5);
Tailwind
colors: {
  custom: {
    50: '#92d3f0',
    500: '#51c0ea',
    950: '#000000',
  },
}
SCSS
$custom: #51c0ea;
$custom-light: #92d3f0;
$custom-dark: #000000;
JSON
{
  "hex": "#51c0ea",
  "rgb": {
    "r": 81,
    "g": 192,
    "b": 234
  },
  "hsl": {
    "h": 196.471,
    "s": 78.462,
    "l": 61.765
  },
  "oklch": {
    "l": 0.76066,
    "c": 0.11637,
    "h": 226.5
  },
  "luminance": 0.45389
}

Semantic roles & 50–950 ramp

primary
#51C0EA
secondary
#E8BFAF
accent
#440BDB
background
#F9FCFE
surface
#F2F9FD
border
#CCD2D5
text
#0E1416
muted
#7E8284

Preview Lab

Preview with #51C0EA

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

Preview Lab → · Contrast checker → · Palette generator →

#51C0EA Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva