#51C7E5#51C7E5

#51C7E5 is a light, moderate cyan. Relative luminance 0.483; OKLCH L 77.5% C 0.112 H 217.6°. Best body text is #000000 at 10.65:1 contrast (WCAG AA passes).

Color values

HEX#51C7E5
RGBrgb(81, 199, 229)
HSLhsl(192, 74%, 61%)
HSVhsv(192, 65%, 90%)
CMYKcmyk(64.6%, 13.1%, 0%, 10.2%)
CIE-LABlab(74.98, -23.97, -24.67)
CIE-LCHlch(74.98, 34.40, 225.83°)
OKLaboklab(77.48% -0.089 -0.0687)
OKLCHoklch(77.48% 0.112 217.6)
XYZxyz(37.9538, 48.2492, 81.4264)
Luminance0.4825 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51C7E5 #E56F51
analogous
#51E5B9 #51C7E5 #517DE5
triadic
#51C7E5 #E551C7 #C7E551
tetradic
#51C7E5 #B951E5 #E56F51 #7DE551
square
#51C7E5 #B951E5 #E56F51 #7DE551
split-complementary
#51C7E5 #E5517D #E5B951
monochromatic
#1887A3 #20B3D8 #51C7E5 #86D8ED #BBE9F5

Accessibility & contrast

On white

1.97
#51C7E5 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

10.65
#51C7E5 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C7E5
10.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51C7E5#FFFFFF#000000##000000
##51C7E51.001.9710.6510.65
#FFFFFF1.971.0021.0021.00
#00000010.6521.001.001.00
##00000010.6521.001.001.00

Color blindness preview

Protanopia (red-blind)
#B3C1E7
Deuteranopia (green-blind)
#9EB2E5
Tritanopia (blue-blind)
#00D1D0
Achromatopsia (no color)
#B9B9B9

Design tokens & code

CSS
--color: #51c7e5;
/* rgb */ color: rgb(81, 199, 229);
/* oklch */ color: oklch(77.5% 0.112 217.6);
Tailwind
colors: {
  custom: {
    50: '#91d8ed',
    500: '#51c7e5',
    950: '#000000',
  },
}
SCSS
$custom: #51c7e5;
$custom-light: #91d8ed;
$custom-dark: #000000;
JSON
{
  "hex": "#51c7e5",
  "rgb": {
    "r": 81,
    "g": 199,
    "b": 229
  },
  "hsl": {
    "h": 192.162,
    "s": 74,
    "l": 60.784
  },
  "oklch": {
    "l": 0.77478,
    "c": 0.11246,
    "h": 217.6
  },
  "luminance": 0.48253
}

Semantic roles & 50–950 ramp

primary
#51C7E5
secondary
#E5B8AD
accent
#380FD6
background
#F9FDFE
surface
#F2FAFD
border
#CCD3D5
text
#0E1416
muted
#7E8384

Preview Lab

Preview with #51C7E5

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

Preview Lab → · Contrast checker → · Palette generator →

#51C7E5 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva