#51C7E9#51C7E9

#51C7E9 is a light, moderate cyan. Relative luminance 0.485; OKLCH L 77.6% C 0.115 H 220.3°. Best body text is #000000 at 10.70:1 contrast (WCAG AA passes).

Color values

HEX#51C7E9
RGBrgb(81, 199, 233)
HSLhsl(193, 78%, 62%)
HSVhsv(193, 65%, 91%)
CMYKcmyk(65.2%, 14.6%, 0%, 8.6%)
CIE-LABlab(75.12, -22.76, -26.61)
CIE-LCHlch(75.12, 35.02, 229.46°)
OKLaboklab(77.64% -0.0875 -0.0742)
OKLCHoklch(77.64% 0.115 220.3)
XYZxyz(38.5187, 48.4752, 84.4016)
Luminance0.4848 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51C7E9 #E97351
analogous
#51E9BF #51C7E9 #517BE9
triadic
#51C7E9 #E951C7 #C7E951
tetradic
#51C7E9 #BF51E9 #E97351 #7BE951
square
#51C7E9 #BF51E9 #E97351 #7BE951
split-complementary
#51C7E9 #E9517B #E9BF51
monochromatic
#1689AA #1CB5E0 #51C7E9 #87D8F0 #BEEAF7

Accessibility & contrast

On white

1.96
#51C7E9 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

10.70
#51C7E9 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C7E9
10.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51C7E9#FFFFFF#000000##000000
##51C7E91.001.9610.7010.70
#FFFFFF1.961.0021.0021.00
#00000010.7021.001.001.00
##00000010.7021.001.001.00

Color blindness preview

Protanopia (red-blind)
#B2C2EB
Deuteranopia (green-blind)
#9DB2E9
Tritanopia (blue-blind)
#00D2D2
Achromatopsia (no color)
#B9B9B9

Design tokens & code

CSS
--color: #51c7e9;
/* rgb */ color: rgb(81, 199, 233);
/* oklch */ color: oklch(77.6% 0.115 220.3);
Tailwind
colors: {
  custom: {
    50: '#92d8f0',
    500: '#51c7e9',
    950: '#000000',
  },
}
SCSS
$custom: #51c7e9;
$custom-light: #92d8f0;
$custom-dark: #000000;
JSON
{
  "hex": "#51c7e9",
  "rgb": {
    "r": 81,
    "g": 199,
    "b": 233
  },
  "hsl": {
    "h": 193.421,
    "s": 77.551,
    "l": 61.569
  },
  "oklch": {
    "l": 0.77638,
    "c": 0.11474,
    "h": 220.3
  },
  "luminance": 0.48479
}

Semantic roles & 50–950 ramp

primary
#51C7E9
secondary
#E7BBAF
accent
#3A0CDA
background
#F9FDFE
surface
#F2FAFD
border
#CCD3D5
text
#0E1416
muted
#7E8384

Preview Lab

Preview with #51C7E9

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

Preview Lab → · Contrast checker → · Palette generator →

#51C7E9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva