#51BDDC#51BDDC

#51BDDC is a light, moderate cyan. Relative luminance 0.433; OKLCH L 74.8% C 0.107 H 219.9°. Best body text is #000000 at 9.66:1 contrast (WCAG AA passes).

Color values

HEX#51BDDC
RGBrgb(81, 189, 220)
HSLhsl(193, 67%, 59%)
HSVhsv(193, 63%, 86%)
CMYKcmyk(63.2%, 14.1%, 0%, 13.7%)
CIE-LABlab(71.76, -21.61, -24.71)
CIE-LCHlch(71.76, 32.83, 228.83°)
OKLaboklab(74.79% -0.0823 -0.0688)
OKLCHoklch(74.79% 0.107 219.9)
XYZxyz(34.5040, 43.3082, 74.2372)
Luminance0.4331 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51BDDC #DC7051
analogous
#51DCB5 #51BDDC #5178DC
triadic
#51BDDC #DC51BD #BDDC51
tetradic
#51BDDC #B551DC #DC7051 #78DC51
square
#51BDDC #B551DC #DC7051 #78DC51
split-complementary
#51BDDC #DC5178 #DCB551
monochromatic
#1E7A95 #28A4C8 #51BDDC #84D0E6 #B7E4F0

Accessibility & contrast

On white

2.17
#51BDDC on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.66
#51BDDC on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BDDC
9.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51BDDC#FFFFFF#000000##000000
##51BDDC1.002.179.669.66
#FFFFFF2.171.0021.0021.00
#0000009.6621.001.001.00
##0000009.6621.001.001.00

Color blindness preview

Protanopia (red-blind)
#AAB8DE
Deuteranopia (green-blind)
#96A9DC
Tritanopia (blue-blind)
#00C7C7
Achromatopsia (no color)
#B0B0B0

Design tokens & code

CSS
--color: #51bddc;
/* rgb */ color: rgb(81, 189, 220);
/* oklch */ color: oklch(74.8% 0.107 219.9);
Tailwind
colors: {
  custom: {
    50: '#90d1e7',
    500: '#51bddc',
    950: '#000000',
  },
}
SCSS
$custom: #51bddc;
$custom-light: #90d1e7;
$custom-dark: #000000;
JSON
{
  "hex": "#51bddc",
  "rgb": {
    "r": 81,
    "g": 189,
    "b": 220
  },
  "hsl": {
    "h": 193.381,
    "s": 66.507,
    "l": 59.02
  },
  "oklch": {
    "l": 0.74791,
    "c": 0.10725,
    "h": 219.9
  },
  "luminance": 0.43312
}

Semantic roles & 50–950 ramp

primary
#51BDDC
secondary
#E0B5A9
accent
#653EE9
background
#F9FCFE
surface
#F2F9FC
border
#CCD2D5
text
#0E1416
muted
#7E8284

Preview Lab

Preview with #51BDDC

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

Preview Lab → · Contrast checker → · Palette generator →

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