#51C8E7#51C8E7

#51C8E7 is a light, moderate cyan. Relative luminance 0.488; OKLCH L 77.8% C 0.114 H 218.2°. Best body text is #000000 at 10.77:1 contrast (WCAG AA passes).

Color values

HEX	#51C8E7
RGB	rgb(81, 200, 231)
HSL	hsl(192, 76%, 61%)
HSV	hsv(192, 65%, 91%)
CMYK	cmyk(64.9%, 13.4%, 0%, 9.4%)
CIE-LAB	lab(75.34, -23.87, -25.20)
CIE-LCH	lch(75.34, 34.71, 226.55°)
OKLab	oklab(77.79% -0.0893 -0.0702)
OKLCH	oklch(77.79% 0.114 218.2)
XYZ	xyz(38.4655, 48.8232, 82.9824)
Luminance	0.4883 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C8E7 #E77051

analogous

#51E7BB #51C8E7 #517DE7

triadic

#51C8E7 #E751C8 #C8E751

tetradic

#51C8E7 #BB51E7 #E77051 #7DE751

square

#51C8E7 #BB51E7 #E77051 #7DE751

split-complementary

#51C8E7 #E7517D #E7BB51

monochromatic

#1789A7 #1EB5DC #51C8E7 #87D9EE #BDEAF6

Accessibility & contrast

On white

1.95

#51C8E7 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.77

#51C8E7 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C8E7

10.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C8E7	#FFFFFF	#000000	##000000
##51C8E7	1.00	1.95	10.77	10.77
#FFFFFF	1.95	1.00	21.00	21.00
#000000	10.77	21.00	1.00	1.00
##000000	10.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B4C3E9

Deuteranopia (green-blind)

#9FB3E7

Tritanopia (blue-blind)

#00D3D2

Achromatopsia (no color)

#BABABA

Design tokens & code

CSS

--color: #51c8e7;
/* rgb */ color: rgb(81, 200, 231);
/* oklch */ color: oklch(77.8% 0.114 218.2);

Tailwind

colors: {
  custom: {
    50: '#92d9ee',
    500: '#51c8e7',
    950: '#000000',
  },
}

SCSS

$custom: #51c8e7;
$custom-light: #92d9ee;
$custom-dark: #000000;

JSON

{
  "hex": "#51c8e7",
  "rgb": {
    "r": 81,
    "g": 200,
    "b": 231
  },
  "hsl": {
    "h": 192.4,
    "s": 75.758,
    "l": 61.176
  },
  "oklch": {
    "l": 0.77789,
    "c": 0.11357,
    "h": 218.2
  },
  "luminance": 0.48827
}

Semantic roles & 50–950 ramp

primary

#51C8E7

secondary

#E6B9AE

accent

#370ED8

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C8E7

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

Preview Lab → · Contrast checker → · Palette generator →