#51C7EE#51C7EE

#51C7EE is a light, moderate cyan. Relative luminance 0.488; OKLCH L 77.8% C 0.118 H 223.4°. Best body text is #000000 at 10.75:1 contrast (WCAG AA passes).

Color values

HEX#51C7EE
RGBrgb(81, 199, 238)
HSLhsl(195, 82%, 63%)
HSVhsv(195, 66%, 93%)
CMYKcmyk(66%, 16.4%, 0%, 6.7%)
CIE-LABlab(75.30, -21.24, -29.03)
CIE-LCHlch(75.30, 35.97, 233.81°)
OKLaboklab(77.84% -0.0857 -0.081)
OKLCHoklch(77.84% 0.118 223.4)
XYZxyz(39.2431, 48.7650, 88.2167)
Luminance0.4877 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51C7EE #EE7851
analogous
#51EEC6 #51C7EE #5179EE
triadic
#51C7EE #EE51C7 #C7EE51
tetradic
#51C7EE #C651EE #EE7851 #79EE51
square
#51C7EE #C651EE #EE7851 #79EE51
split-complementary
#51C7EE #EE5179 #EEC651
monochromatic
#118BB3 #19B5E9 #51C7EE #89D9F3 #C1EBF9

Accessibility & contrast

On white

1.95
#51C7EE on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

10.75
#51C7EE on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C7EE
10.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51C7EE#FFFFFF#000000##000000
##51C7EE1.001.9510.7510.75
#FFFFFF1.951.0021.0021.00
#00000010.7521.001.001.00
##00000010.7521.001.001.00

Color blindness preview

Protanopia (red-blind)
#B1C3F0
Deuteranopia (green-blind)
#9BB2EE
Tritanopia (blue-blind)
#00D3D4
Achromatopsia (no color)
#B9B9B9

Design tokens & code

CSS
--color: #51c7ee;
/* rgb */ color: rgb(81, 199, 238);
/* oklch */ color: oklch(77.8% 0.118 223.4);
Tailwind
colors: {
  custom: {
    50: '#92d8f3',
    500: '#51c7ee',
    950: '#000000',
  },
}
SCSS
$custom: #51c7ee;
$custom-light: #92d8f3;
$custom-dark: #000000;
JSON
{
  "hex": "#51c7ee",
  "rgb": {
    "r": 81,
    "g": 199,
    "b": 238
  },
  "hsl": {
    "h": 194.904,
    "s": 82.199,
    "l": 62.549
  },
  "oklch": {
    "l": 0.77843,
    "c": 0.11793,
    "h": 223.4
  },
  "luminance": 0.48769
}

Semantic roles & 50–950 ramp

primary
#51C7EE
secondary
#EABFB1
accent
#3C07DF
background
#F9FDFE
surface
#F2FAFD
border
#CCD3D5
text
#0E1417
muted
#7E8385

Preview Lab

Preview with #51C7EE

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

Preview Lab → · Contrast checker → · Palette generator →

#51C7EE Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva