#51BBE7#51BBE7

#51BBE7 is a light, moderate cyan. Relative luminance 0.431; OKLCH L 74.8% C 0.115 H 228.7°. Best body text is #000000 at 9.61:1 contrast (WCAG AA passes).

Color values

HEX#51BBE7
RGBrgb(81, 187, 231)
HSLhsl(198, 76%, 61%)
HSVhsv(198, 65%, 91%)
CMYKcmyk(64.9%, 19%, 0%, 9.4%)
CIE-LABlab(71.59, -17.20, -30.96)
CIE-LCHlch(71.59, 35.41, 240.94°)
OKLaboklab(74.79% -0.0762 -0.0866)
OKLCHoklch(74.79% 0.115 228.7)
XYZxyz(35.5817, 43.0557, 82.0212)
Luminance0.4306 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51BBE7 #E77D51
analogous
#51E7C8 #51BBE7 #5170E7
triadic
#51BBE7 #E751BB #BBE751
tetradic
#51BBE7 #C851E7 #E77D51 #70E751
square
#51BBE7 #C851E7 #E77D51 #70E751
split-complementary
#51BBE7 #E75170 #E7C851
monochromatic
#177CA7 #1EA5DC #51BBE7 #87D0EE #BDE5F6

Accessibility & contrast

On white

2.18
#51BBE7 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.61
#51BBE7 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBE7
9.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51BBE7#FFFFFF#000000##000000
##51BBE71.002.189.619.61
#FFFFFF2.181.0021.0021.00
#0000009.6121.001.001.00
##0000009.6121.001.001.00

Color blindness preview

Protanopia (red-blind)
#A4B8E9
Deuteranopia (green-blind)
#8FA9E6
Tritanopia (blue-blind)
#00C7C9
Achromatopsia (no color)
#AFAFAF

Design tokens & code

CSS
--color: #51bbe7;
/* rgb */ color: rgb(81, 187, 231);
/* oklch */ color: oklch(74.8% 0.115 228.7);
Tailwind
colors: {
  custom: {
    50: '#91cfee',
    500: '#51bbe7',
    950: '#000000',
  },
}
SCSS
$custom: #51bbe7;
$custom-light: #91cfee;
$custom-dark: #000000;
JSON
{
  "hex": "#51bbe7",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 231
  },
  "hsl": {
    "h": 197.6,
    "s": 75.758,
    "l": 61.176
  },
  "oklch": {
    "l": 0.74789,
    "c": 0.11533,
    "h": 228.7
  },
  "luminance": 0.43059
}

Semantic roles & 50–950 ramp

primary
#51BBE7
secondary
#E6BEAE
accent
#490ED8
background
#F9FCFE
surface
#F2F9FD
border
#CCD2D5
text
#0E1316
muted
#7E8284

Preview Lab

Preview with #51BBE7

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

Preview Lab → · Contrast checker → · Palette generator →

#51BBE7 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva