#51C4DD#51C4DD

#51C4DD is a light, moderate cyan. Relative luminance 0.465; OKLCH L 76.5% C 0.108 H 214.6°. Best body text is #000000 at 10.29:1 contrast (WCAG AA passes).

Color values

HEX#51C4DD
RGBrgb(81, 196, 221)
HSLhsl(191, 67%, 59%)
HSVhsv(191, 63%, 87%)
CMYKcmyk(63.3%, 11.3%, 0%, 13.3%)
CIE-LABlab(73.83, -24.85, -22.10)
CIE-LCHlch(73.83, 33.26, 221.64°)
OKLaboklab(76.46% -0.0891 -0.0614)
OKLCHoklch(76.46% 0.108 214.6)
XYZxyz(36.1790, 46.4458, 75.4508)
Luminance0.4645 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51C4DD #DD6A51
analogous
#51DDB0 #51C4DD #517EDD
triadic
#51C4DD #DD51C4 #C4DD51
tetradic
#51C4DD #B051DD #DD6A51 #7EDD51
square
#51C4DD #B051DD #DD6A51 #7EDD51
split-complementary
#51C4DD #DD517E #DDB051
monochromatic
#1D8196 #27ACC9 #51C4DD #84D5E7 #B7E7F1

Accessibility & contrast

On white

2.04
#51C4DD on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

10.29
#51C4DD on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C4DD
10.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51C4DD#FFFFFF#000000##000000
##51C4DD1.002.0410.2910.29
#FFFFFF2.041.0021.0021.00
#00000010.2921.001.001.00
##00000010.2921.001.001.00

Color blindness preview

Protanopia (red-blind)
#B2BEDE
Deuteranopia (green-blind)
#9EAFDD
Tritanopia (blue-blind)
#00CECC
Achromatopsia (no color)
#B5B5B5

Design tokens & code

CSS
--color: #51c4dd;
/* rgb */ color: rgb(81, 196, 221);
/* oklch */ color: oklch(76.5% 0.108 214.6);
Tailwind
colors: {
  custom: {
    50: '#90d6e7',
    500: '#51c4dd',
    950: '#000000',
  },
}
SCSS
$custom: #51c4dd;
$custom-light: #90d6e7;
$custom-dark: #000000;
JSON
{
  "hex": "#51c4dd",
  "rgb": {
    "r": 81,
    "g": 196,
    "b": 221
  },
  "hsl": {
    "h": 190.714,
    "s": 67.308,
    "l": 59.216
  },
  "oklch": {
    "l": 0.76464,
    "c": 0.1082,
    "h": 214.6
  },
  "luminance": 0.4645
}

Semantic roles & 50–950 ramp

primary
#51C4DD
secondary
#E0B3AA
accent
#5C3EEA
background
#F9FDFE
surface
#F2FAFC
border
#CCD3D5
text
#0E1416
muted
#7E8384

Preview Lab

Preview with #51C4DD

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

Preview Lab → · Contrast checker → · Palette generator →

#51C4DD Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva