#51C0DF#51C0DF

#51C0DF is a light, moderate cyan. Relative luminance 0.448; OKLCH L 75.6% C 0.109 H 219.4°. Best body text is #000000 at 9.96:1 contrast (WCAG AA passes).

Color values

HEX#51C0DF
RGBrgb(81, 192, 223)
HSLhsl(193, 69%, 60%)
HSVhsv(193, 64%, 87%)
CMYKcmyk(63.7%, 13.9%, 0%, 12.5%)
CIE-LABlab(72.74, -22.24, -24.85)
CIE-LCHlch(72.74, 33.34, 228.18°)
OKLaboklab(75.61% -0.0842 -0.0692)
OKLCHoklch(75.61% 0.109 219.4)
XYZxyz(35.5569, 44.7726, 76.5658)
Luminance0.4478 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51C0DF #DF7051
analogous
#51DFB7 #51C0DF #5179DF
triadic
#51C0DF #DF51C0 #C0DF51
tetradic
#51C0DF #B751DF #DF7051 #79DF51
square
#51C0DF #B751DF #DF7051 #79DF51
split-complementary
#51C0DF #DF5179 #DFB751
monochromatic
#1C7E99 #26A9CD #51C0DF #85D3E9 #B8E5F2

Accessibility & contrast

On white

2.11
#51C0DF on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.96
#51C0DF on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C0DF
9.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51C0DF#FFFFFF#000000##000000
##51C0DF1.002.119.969.96
#FFFFFF2.111.0021.0021.00
#0000009.9621.001.001.00
##0000009.9621.001.001.00

Color blindness preview

Protanopia (red-blind)
#ADBBE1
Deuteranopia (green-blind)
#98ACDF
Tritanopia (blue-blind)
#00CACA
Achromatopsia (no color)
#B2B2B2

Design tokens & code

CSS
--color: #51c0df;
/* rgb */ color: rgb(81, 192, 223);
/* oklch */ color: oklch(75.6% 0.109 219.4);
Tailwind
colors: {
  custom: {
    50: '#90d3e9',
    500: '#51c0df',
    950: '#000000',
  },
}
SCSS
$custom: #51c0df;
$custom-light: #90d3e9;
$custom-dark: #000000;
JSON
{
  "hex": "#51c0df",
  "rgb": {
    "r": 81,
    "g": 192,
    "b": 223
  },
  "hsl": {
    "h": 193.099,
    "s": 68.932,
    "l": 59.608
  },
  "oklch": {
    "l": 0.75611,
    "c": 0.10899,
    "h": 219.4
  },
  "luminance": 0.44776
}

Semantic roles & 50–950 ramp

primary
#51C0DF
secondary
#E1B6AA
accent
#623CEC
background
#F9FCFE
surface
#F2F9FC
border
#CCD2D5
text
#0E1416
muted
#7E8284

Preview Lab

Preview with #51C0DF

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

Preview Lab → · Contrast checker → · Palette generator →

#51C0DF Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva