#51C0DB#51C0DB

#51C0DB is a light, moderate cyan. Relative luminance 0.446; OKLCH L 75.5% C 0.107 H 216.6°. Best body text is #000000 at 9.91:1 contrast (WCAG AA passes).

Color values

HEX#51C0DB
RGBrgb(81, 192, 219)
HSLhsl(192, 66%, 59%)
HSVhsv(192, 63%, 86%)
CMYKcmyk(63%, 12.3%, 0%, 14.1%)
CIE-LABlab(72.60, -23.44, -22.89)
CIE-LCHlch(72.60, 32.76, 224.32°)
OKLaboklab(75.45% -0.0858 -0.0636)
OKLCHoklch(75.45% 0.107 216.6)
XYZxyz(35.0239, 44.5594, 73.7591)
Luminance0.4456 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51C0DB #DB6C51
analogous
#51DBB1 #51C0DB #517BDB
triadic
#51C0DB #DB51C0 #C0DB51
tetradic
#51C0DB #B151DB #DB6C51 #7BDB51
square
#51C0DB #B151DB #DB6C51 #7BDB51
split-complementary
#51C0DB #DB517B #DBB151
monochromatic
#1E7C93 #29A7C6 #51C0DB #84D2E5 #B6E5F0

Accessibility & contrast

On white

2.12
#51C0DB on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.91
#51C0DB on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C0DB
9.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51C0DB#FFFFFF#000000##000000
##51C0DB1.002.129.919.91
#FFFFFF2.121.0021.0021.00
#0000009.9121.001.001.00
##0000009.9121.001.001.00

Color blindness preview

Protanopia (red-blind)
#AEBBDD
Deuteranopia (green-blind)
#9AACDB
Tritanopia (blue-blind)
#00CAC8
Achromatopsia (no color)
#B2B2B2

Design tokens & code

CSS
--color: #51c0db;
/* rgb */ color: rgb(81, 192, 219);
/* oklch */ color: oklch(75.5% 0.107 216.6);
Tailwind
colors: {
  custom: {
    50: '#90d3e6',
    500: '#51c0db',
    950: '#000000',
  },
}
SCSS
$custom: #51c0db;
$custom-light: #90d3e6;
$custom-dark: #000000;
JSON
{
  "hex": "#51c0db",
  "rgb": {
    "r": 81,
    "g": 192,
    "b": 219
  },
  "hsl": {
    "h": 191.739,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.75451,
    "c": 0.10679,
    "h": 216.6
  },
  "luminance": 0.44563
}

Semantic roles & 50–950 ramp

primary
#51C0DB
secondary
#DFB3A9
accent
#603FE9
background
#F9FCFE
surface
#F2F9FC
border
#CCD2D5
text
#0E1415
muted
#7E8284

Preview Lab

Preview with #51C0DB

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

Preview Lab → · Contrast checker → · Palette generator →

#51C0DB Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva