#51BDE6#51BDE6

#51BDE6 is a light, moderate cyan. Relative luminance 0.439; OKLCH L 75.2% C 0.114 H 226.5°. Best body text is #000000 at 9.77:1 contrast (WCAG AA passes).

Color values

HEX#51BDE6
RGBrgb(81, 189, 230)
HSLhsl(197, 75%, 61%)
HSVhsv(197, 65%, 90%)
CMYKcmyk(64.8%, 17.8%, 0%, 9.8%)
CIE-LABlab(72.13, -18.55, -29.58)
CIE-LCHlch(72.13, 34.92, 237.91°)
OKLaboklab(75.21% -0.0786 -0.0827)
OKLCHoklch(75.21% 0.114 226.5)
XYZxyz(35.8682, 43.8539, 81.4219)
Luminance0.4386 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51BDE6 #E67A51
analogous
#51E6C4 #51BDE6 #5172E6
triadic
#51BDE6 #E651BD #BDE651
tetradic
#51BDE6 #C451E6 #E67A51 #72E651
square
#51BDE6 #C451E6 #E67A51 #72E651
split-complementary
#51BDE6 #E65172 #E6C451
monochromatic
#187EA5 #1FA7DA #51BDE6 #87D1EE #BCE6F5

Accessibility & contrast

On white

2.15
#51BDE6 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.77
#51BDE6 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BDE6
9.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51BDE6#FFFFFF#000000##000000
##51BDE61.002.159.779.77
#FFFFFF2.151.0021.0021.00
#0000009.7721.001.001.00
##0000009.7721.001.001.00

Color blindness preview

Protanopia (red-blind)
#A7B9E8
Deuteranopia (green-blind)
#92AAE6
Tritanopia (blue-blind)
#00C9CA
Achromatopsia (no color)
#B1B1B1

Design tokens & code

CSS
--color: #51bde6;
/* rgb */ color: rgb(81, 189, 230);
/* oklch */ color: oklch(75.2% 0.114 226.5);
Tailwind
colors: {
  custom: {
    50: '#91d1ee',
    500: '#51bde6',
    950: '#000000',
  },
}
SCSS
$custom: #51bde6;
$custom-light: #91d1ee;
$custom-dark: #000000;
JSON
{
  "hex": "#51bde6",
  "rgb": {
    "r": 81,
    "g": 189,
    "b": 230
  },
  "hsl": {
    "h": 196.51,
    "s": 74.874,
    "l": 60.98
  },
  "oklch": {
    "l": 0.75206,
    "c": 0.11404,
    "h": 226.5
  },
  "luminance": 0.43858
}

Semantic roles & 50–950 ramp

primary
#51BDE6
secondary
#E5BDAD
accent
#460ED7
background
#F9FCFE
surface
#F2F9FD
border
#CCD2D5
text
#0E1416
muted
#7E8284

Preview Lab

Preview with #51BDE6

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

Preview Lab → · Contrast checker → · Palette generator →

#51BDE6 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva