#51CFF9#51CFF9

#51CFF9 is a light, vivid cyan. Relative luminance 0.532; OKLCH L 80.1% C 0.124 H 223.8°. Best body text is #000000 at 11.64:1 contrast (WCAG AA passes).

Color values

HEX#51CFF9
RGBrgb(81, 207, 249)
HSLhsl(195, 93%, 65%)
HSVhsv(195, 67%, 98%)
CMYKcmyk(67.5%, 16.9%, 0%, 2.4%)
CIE-LABlab(78.00, -21.93, -30.78)
CIE-LCHlch(78.00, 37.80, 234.53°)
OKLaboklab(80.13% -0.0895 -0.086)
OKLCHoklch(80.13% 0.124 223.8)
XYZxyz(42.7981, 53.2098, 97.6191)
Luminance0.5322 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51CFF9 #F97B51
analogous
#51F9CF #51CFF9 #517BF9
triadic
#51CFF9 #F951CF #CFF951
tetradic
#51CFF9 #CF51F9 #F97B51 #7BF951
square
#51CFF9 #CF51F9 #F97B51 #7BF951
split-complementary
#51CFF9 #F9517B #F9CF51
monochromatic
#0798C9 #16BFF7 #51CFF9 #8CDFFB #C7F0FD

Accessibility & contrast

On white

1.80
#51CFF9 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

11.64
#51CFF9 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51CFF9
11.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51CFF9#FFFFFF#000000##000000
##51CFF91.001.8011.6411.64
#FFFFFF1.801.0021.0021.00
#00000011.6421.001.001.00
##00000011.6421.001.001.00

Color blindness preview

Protanopia (red-blind)
#B7CBFB
Deuteranopia (green-blind)
#A0B9F9
Tritanopia (blue-blind)
#00DCDD
Achromatopsia (no color)
#C1C1C1

Design tokens & code

CSS
--color: #51cff9;
/* rgb */ color: rgb(81, 207, 249);
/* oklch */ color: oklch(80.1% 0.124 223.8);
Tailwind
colors: {
  custom: {
    50: '#94ddfb',
    500: '#51cff9',
    950: '#000000',
  },
}
SCSS
$custom: #51cff9;
$custom-light: #94ddfb;
$custom-dark: #000000;
JSON
{
  "hex": "#51cff9",
  "rgb": {
    "r": 81,
    "g": 207,
    "b": 249
  },
  "hsl": {
    "h": 195,
    "s": 93.333,
    "l": 64.706
  },
  "oklch": {
    "l": 0.80134,
    "c": 0.12417,
    "h": 223.8
  },
  "luminance": 0.53215
}

Semantic roles & 50–950 ramp

primary
#51CFF9
secondary
#C55029
accent
#3900E6
background
#FCFEFF
surface
#F5FCFF
border
#CFD5D7
text
#0F1517
muted
#808485

Preview Lab

Preview with #51CFF9

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

Preview Lab → · Contrast checker → · Palette generator →

#51CFF9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva