#51CAF0#51CAF0

#51CAF0 is a light, moderate cyan. Relative luminance 0.503; OKLCH L 78.6% C 0.119 H 222.3°. Best body text is #000000 at 11.06:1 contrast (WCAG AA passes).

Color values

HEX#51CAF0
RGBrgb(81, 202, 240)
HSLhsl(194, 84%, 63%)
HSVhsv(194, 66%, 94%)
CMYKcmyk(66.3%, 15.8%, 0%, 5.9%)
CIE-LABlab(76.24, -22.15, -28.67)
CIE-LCHlch(76.24, 36.23, 232.30°)
OKLaboklab(78.62% -0.0879 -0.08)
OKLCHoklch(78.62% 0.119 222.3)
XYZxyz(40.2357, 50.2773, 90.0052)
Luminance0.5028 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51CAF0 #F07751
analogous
#51F0C7 #51CAF0 #517AF0
triadic
#51CAF0 #F051CA #CAF051
tetradic
#51CAF0 #C751F0 #F07751 #7AF051
square
#51CAF0 #C751F0 #F07751 #7AF051
split-complementary
#51CAF0 #F0517A #F0C751
monochromatic
#108FB7 #19B9EB #51CAF0 #89DBF5 #C2ECFA

Accessibility & contrast

On white

1.90
#51CAF0 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

11.06
#51CAF0 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51CAF0
11.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51CAF0#FFFFFF#000000##000000
##51CAF01.001.9011.0611.06
#FFFFFF1.901.0021.0021.00
#00000011.0621.001.001.00
##00000011.0621.001.001.00

Color blindness preview

Protanopia (red-blind)
#B4C5F2
Deuteranopia (green-blind)
#9EB5F0
Tritanopia (blue-blind)
#00D6D6
Achromatopsia (no color)
#BCBCBC

Design tokens & code

CSS
--color: #51caf0;
/* rgb */ color: rgb(81, 202, 240);
/* oklch */ color: oklch(78.6% 0.119 222.3);
Tailwind
colors: {
  custom: {
    50: '#93daf5',
    500: '#51caf0',
    950: '#000000',
  },
}
SCSS
$custom: #51caf0;
$custom-light: #93daf5;
$custom-dark: #000000;
JSON
{
  "hex": "#51caf0",
  "rgb": {
    "r": 81,
    "g": 202,
    "b": 240
  },
  "hsl": {
    "h": 194.34,
    "s": 84.127,
    "l": 62.941
  },
  "oklch": {
    "l": 0.78616,
    "c": 0.11888,
    "h": 222.3
  },
  "luminance": 0.50282
}

Semantic roles & 50–950 ramp

primary
#51CAF0
secondary
#B64F2F
accent
#3905E1
background
#FCFEFF
surface
#F5FBFE
border
#CFD4D6
text
#0E1417
muted
#7F8385

Preview Lab

Preview with #51CAF0

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

Preview Lab → · Contrast checker → · Palette generator →

#51CAF0 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva