#51C8E8#51C8E8

#51C8E8 is a light, moderate cyan. Relative luminance 0.489; OKLCH L 77.8% C 0.114 H 218.8°. Best body text is #000000 at 10.78:1 contrast (WCAG AA passes).

Color values

HEX	#51C8E8
RGB	rgb(81, 200, 232)
HSL	hsl(193, 77%, 61%)
HSV	hsv(193, 65%, 91%)
CMYK	cmyk(65.1%, 13.8%, 0%, 9%)
CIE-LAB	lab(75.38, -23.57, -25.69)
CIE-LCH	lch(75.38, 34.86, 227.46°)
OKLab	oklab(77.83% -0.0889 -0.0715)
OKLCH	oklch(77.83% 0.114 218.8)
XYZ	xyz(38.6071, 48.8799, 83.7284)
Luminance	0.4888 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C8E8 #E87151

analogous

#51E8BD #51C8E8 #517DE8

triadic

#51C8E8 #E851C8 #C8E851

tetradic

#51C8E8 #BD51E8 #E87151 #7DE851

square

#51C8E8 #BD51E8 #E87151 #7DE851

split-complementary

#51C8E8 #E8517D #E8BD51

monochromatic

#1689A8 #1DB6DE #51C8E8 #87D9EF #BDEAF6

Accessibility & contrast

On white

1.95

#51C8E8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.78

#51C8E8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C8E8

10.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C8E8	#FFFFFF	#000000	##000000
##51C8E8	1.00	1.95	10.78	10.78
#FFFFFF	1.95	1.00	21.00	21.00
#000000	10.78	21.00	1.00	1.00
##000000	10.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B4C3EA

Deuteranopia (green-blind)

#9EB3E8

Tritanopia (blue-blind)

#00D3D2

Achromatopsia (no color)

#BABABA

Design tokens & code

CSS

--color: #51c8e8;
/* rgb */ color: rgb(81, 200, 232);
/* oklch */ color: oklch(77.8% 0.114 218.8);

Tailwind

colors: {
  custom: {
    50: '#92d9ef',
    500: '#51c8e8',
    950: '#000000',
  },
}

SCSS

$custom: #51c8e8;
$custom-light: #92d9ef;
$custom-dark: #000000;

JSON

{
  "hex": "#51c8e8",
  "rgb": {
    "r": 81,
    "g": 200,
    "b": 232
  },
  "hsl": {
    "h": 192.715,
    "s": 76.65,
    "l": 61.373
  },
  "oklch": {
    "l": 0.77829,
    "c": 0.11413,
    "h": 218.8
  },
  "luminance": 0.48884
}

Semantic roles & 50–950 ramp

primary

#51C8E8

secondary

#E7BAAE

accent

#380DD9

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C8E8

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

Preview Lab → · Contrast checker → · Palette generator →