#51BEE0#51BEE0

#51BEE0 is a light, moderate cyan. Relative luminance 0.440; OKLCH L 75.2% C 0.110 H 221.8°. Best body text is #000000 at 9.79:1 contrast (WCAG AA passes).

Color values

HEX	#51BEE0
RGB	rgb(81, 190, 224)
HSL	hsl(194, 70%, 60%)
HSV	hsv(194, 64%, 88%)
CMYK	cmyk(63.8%, 15.2%, 0%, 12.2%)
CIE-LAB	lab(72.20, -20.91, -26.22)
CIE-LCH	lch(72.20, 33.54, 231.43°)
OKLab	oklab(75.19% -0.0818 -0.0731)
OKLCH	oklch(75.19% 0.11 221.8)
XYZ	xyz(35.2559, 43.9543, 77.1326)
Luminance	0.4396 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BEE0 #E07351

analogous

#51E0BB #51BEE0 #5176E0

triadic

#51BEE0 #E051BE #BEE051

tetradic

#51BEE0 #BB51E0 #E07351 #76E051

square

#51BEE0 #BB51E0 #E07351 #76E051

split-complementary

#51BEE0 #E05176 #E0BB51

monochromatic

#1C7D9B #25A6CF #51BEE0 #85D1E9 #B9E5F3

Accessibility & contrast

On white

2.14

#51BEE0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.79

#51BEE0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BEE0

9.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BEE0	#FFFFFF	#000000	##000000
##51BEE0	1.00	2.14	9.79	9.79
#FFFFFF	2.14	1.00	21.00	21.00
#000000	9.79	21.00	1.00	1.00
##000000	9.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AABAE2

Deuteranopia (green-blind)

#96ABE0

Tritanopia (blue-blind)

#00C9C9

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #51bee0;
/* rgb */ color: rgb(81, 190, 224);
/* oklch */ color: oklch(75.2% 0.110 221.8);

Tailwind

colors: {
  custom: {
    50: '#90d1e9',
    500: '#51bee0',
    950: '#000000',
  },
}

SCSS

$custom: #51bee0;
$custom-light: #90d1e9;
$custom-dark: #000000;

JSON

{
  "hex": "#51bee0",
  "rgb": {
    "r": 81,
    "g": 190,
    "b": 224
  },
  "hsl": {
    "h": 194.266,
    "s": 69.756,
    "l": 59.804
  },
  "oklch": {
    "l": 0.75187,
    "c": 0.10969,
    "h": 221.8
  },
  "luminance": 0.43958
}

Semantic roles & 50–950 ramp

primary

#51BEE0

secondary

#E2B8AB

accent

#653BED

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BEE0

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

Preview Lab → · Contrast checker → · Palette generator →