#51C7EE#51C7EE

#51C7EE is a light, moderate cyan. Relative luminance 0.488; OKLCH L 77.8% C 0.118 H 223.4°. Best body text is #000000 at 10.75:1 contrast (WCAG AA passes).

Color values

HEX	#51C7EE
RGB	rgb(81, 199, 238)
HSL	hsl(195, 82%, 63%)
HSV	hsv(195, 66%, 93%)
CMYK	cmyk(66%, 16.4%, 0%, 6.7%)
CIE-LAB	lab(75.30, -21.24, -29.03)
CIE-LCH	lch(75.30, 35.97, 233.81°)
OKLab	oklab(77.84% -0.0857 -0.081)
OKLCH	oklch(77.84% 0.118 223.4)
XYZ	xyz(39.2431, 48.7650, 88.2167)
Luminance	0.4877 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C7EE #EE7851

analogous

#51EEC6 #51C7EE #5179EE

triadic

#51C7EE #EE51C7 #C7EE51

tetradic

#51C7EE #C651EE #EE7851 #79EE51

square

#51C7EE #C651EE #EE7851 #79EE51

split-complementary

#51C7EE #EE5179 #EEC651

monochromatic

#118BB3 #19B5E9 #51C7EE #89D9F3 #C1EBF9

Accessibility & contrast

On white

1.95

#51C7EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.75

#51C7EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C7EE

10.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C7EE	#FFFFFF	#000000	##000000
##51C7EE	1.00	1.95	10.75	10.75
#FFFFFF	1.95	1.00	21.00	21.00
#000000	10.75	21.00	1.00	1.00
##000000	10.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B1C3F0

Deuteranopia (green-blind)

#9BB2EE

Tritanopia (blue-blind)

#00D3D4

Achromatopsia (no color)

#B9B9B9

Design tokens & code

CSS

--color: #51c7ee;
/* rgb */ color: rgb(81, 199, 238);
/* oklch */ color: oklch(77.8% 0.118 223.4);

Tailwind

colors: {
  custom: {
    50: '#92d8f3',
    500: '#51c7ee',
    950: '#000000',
  },
}

SCSS

$custom: #51c7ee;
$custom-light: #92d8f3;
$custom-dark: #000000;

JSON

{
  "hex": "#51c7ee",
  "rgb": {
    "r": 81,
    "g": 199,
    "b": 238
  },
  "hsl": {
    "h": 194.904,
    "s": 82.199,
    "l": 62.549
  },
  "oklch": {
    "l": 0.77843,
    "c": 0.11793,
    "h": 223.4
  },
  "luminance": 0.48769
}

Semantic roles & 50–950 ramp

primary

#51C7EE

secondary

#EABFB1

accent

#3C07DF

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1417

muted

#7E8385

Preview Lab

Preview with #51C7EE

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

Preview Lab → · Contrast checker → · Palette generator →