#51C4EE#51C4EE

#51C4EE is a light, moderate cyan. Relative luminance 0.474; OKLCH L 77.2% C 0.118 H 225.7°. Best body text is #000000 at 10.48:1 contrast (WCAG AA passes).

Color values

HEX#51C4EE
RGBrgb(81, 196, 238)
HSLhsl(196, 82%, 63%)
HSVhsv(196, 66%, 93%)
CMYKcmyk(66%, 17.6%, 0%, 6.7%)
CIE-LABlab(74.44, -19.70, -30.35)
CIE-LCHlch(74.44, 36.18, 237.01°)
OKLaboklab(77.15% -0.0827 -0.0848)
OKLCHoklch(77.15% 0.118 225.7)
XYZxyz(38.5597, 47.3981, 87.9889)
Luminance0.4740 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51C4EE #EE7B51
analogous
#51EECA #51C4EE #5175EE
triadic
#51C4EE #EE51C4 #C4EE51
tetradic
#51C4EE #CA51EE #EE7B51 #75EE51
square
#51C4EE #CA51EE #EE7B51 #75EE51
split-complementary
#51C4EE #EE5175 #EECA51
monochromatic
#1188B3 #19B1E9 #51C4EE #89D7F3 #C1EAF9

Accessibility & contrast

On white

2.00
#51C4EE on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

10.48
#51C4EE on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C4EE
10.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51C4EE#FFFFFF#000000##000000
##51C4EE1.002.0010.4810.48
#FFFFFF2.001.0021.0021.00
#00000010.4821.001.001.00
##00000010.4821.001.001.00

Color blindness preview

Protanopia (red-blind)
#ADC0F0
Deuteranopia (green-blind)
#97B0EE
Tritanopia (blue-blind)
#00D0D2
Achromatopsia (no color)
#B7B7B7

Design tokens & code

CSS
--color: #51c4ee;
/* rgb */ color: rgb(81, 196, 238);
/* oklch */ color: oklch(77.2% 0.118 225.7);
Tailwind
colors: {
  custom: {
    50: '#92d6f3',
    500: '#51c4ee',
    950: '#000000',
  },
}
SCSS
$custom: #51c4ee;
$custom-light: #92d6f3;
$custom-dark: #000000;
JSON
{
  "hex": "#51c4ee",
  "rgb": {
    "r": 81,
    "g": 196,
    "b": 238
  },
  "hsl": {
    "h": 196.051,
    "s": 82.199,
    "l": 62.549
  },
  "oklch": {
    "l": 0.77154,
    "c": 0.11847,
    "h": 225.7
  },
  "luminance": 0.47402
}

Semantic roles & 50–950 ramp

primary
#51C4EE
secondary
#EAC0B1
accent
#4107DF
background
#F9FDFE
surface
#F2FAFD
border
#CCD3D5
text
#0E1417
muted
#7E8385

Preview Lab

Preview with #51C4EE

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

Preview Lab → · Contrast checker → · Palette generator →

#51C4EE Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva