#51C8F2#51C8F2

#51C8F2 is a light, vivid cyan. Relative luminance 0.495; OKLCH L 78.2% C 0.121 H 225.0°. Best body text is #000000 at 10.89:1 contrast (WCAG AA passes).

Color values

HEX#51C8F2
RGBrgb(81, 200, 242)
HSLhsl(196, 86%, 63%)
HSVhsv(196, 67%, 95%)
CMYKcmyk(66.5%, 17.4%, 0%, 5.1%)
CIE-LABlab(75.74, -20.52, -30.51)
CIE-LCHlch(75.74, 36.77, 236.08°)
OKLaboklab(78.24% -0.0852 -0.0853)
OKLCHoklch(78.24% 0.121 225)
XYZxyz(40.0682, 49.4643, 91.4231)
Luminance0.4947 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51C8F2 #F27B51
analogous
#51F2CB #51C8F2 #5177F2
triadic
#51C8F2 #F251C8 #C8F251
tetradic
#51C8F2 #CB51F2 #F27B51 #77F251
square
#51C8F2 #CB51F2 #F27B51 #77F251
split-complementary
#51C8F2 #F25177 #F2CB51
monochromatic
#0E8EBB #18B6EE #51C8F2 #8ADAF6 #C3ECFB

Accessibility & contrast

On white

1.93
#51C8F2 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

10.89
#51C8F2 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C8F2
10.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51C8F2#FFFFFF#000000##000000
##51C8F21.001.9310.8910.89
#FFFFFF1.931.0021.0021.00
#00000010.8921.001.001.00
##00000010.8921.001.001.00

Color blindness preview

Protanopia (red-blind)
#B1C4F4
Deuteranopia (green-blind)
#9AB3F2
Tritanopia (blue-blind)
#00D5D6
Achromatopsia (no color)
#BBBBBB

Design tokens & code

CSS
--color: #51c8f2;
/* rgb */ color: rgb(81, 200, 242);
/* oklch */ color: oklch(78.2% 0.121 225.0);
Tailwind
colors: {
  custom: {
    50: '#93d8f6',
    500: '#51c8f2',
    950: '#000000',
  },
}
SCSS
$custom: #51c8f2;
$custom-light: #93d8f6;
$custom-dark: #000000;
JSON
{
  "hex": "#51c8f2",
  "rgb": {
    "r": 81,
    "g": 200,
    "b": 242
  },
  "hsl": {
    "h": 195.652,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.7824,
    "c": 0.12055,
    "h": 225
  },
  "luminance": 0.49469
}

Semantic roles & 50–950 ramp

primary
#51C8F2
secondary
#ECC2B3
accent
#3D03E3
background
#F9FDFF
surface
#F2FAFE
border
#CCD3D6
text
#0E1417
muted
#7E8385

Preview Lab

Preview with #51C8F2

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

Preview Lab → · Contrast checker → · Palette generator →

#51C8F2 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva