#51C8EE#51C8EE

#51C8EE is a light, moderate cyan. Relative luminance 0.492; OKLCH L 78.1% C 0.118 H 222.6°. Best body text is #000000 at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#51C8EE
RGB	rgb(81, 200, 238)
HSL	hsl(195, 82%, 63%)
HSV	hsv(195, 66%, 93%)
CMYK	cmyk(66%, 16%, 0%, 6.7%)
CIE-LAB	lab(75.59, -21.75, -28.59)
CIE-LCH	lch(75.59, 35.92, 232.74°)
OKLab	oklab(78.07% -0.0867 -0.0798)
OKLCH	oklch(78.07% 0.118 222.6)
XYZ	xyz(39.4740, 49.2266, 88.2937)
Luminance	0.4923 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C8EE #EE7751

analogous

#51EEC5 #51C8EE #517AEE

triadic

#51C8EE #EE51C8 #C8EE51

tetradic

#51C8EE #C551EE #EE7751 #7AEE51

square

#51C8EE #C551EE #EE7751 #7AEE51

split-complementary

#51C8EE #EE517A #EEC551

monochromatic

#118CB3 #19B6E9 #51C8EE #89DAF3 #C1EBF9

Accessibility & contrast

On white

1.94

#51C8EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.85

#51C8EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C8EE

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C8EE	#FFFFFF	#000000	##000000
##51C8EE	1.00	1.94	10.85	10.85
#FFFFFF	1.94	1.00	21.00	21.00
#000000	10.85	21.00	1.00	1.00
##000000	10.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B2C3F0

Deuteranopia (green-blind)

#9CB3EE

Tritanopia (blue-blind)

#00D4D4

Achromatopsia (no color)

#BABABA

Design tokens & code

CSS

--color: #51c8ee;
/* rgb */ color: rgb(81, 200, 238);
/* oklch */ color: oklch(78.1% 0.118 222.6);

Tailwind

colors: {
  custom: {
    50: '#93d8f3',
    500: '#51c8ee',
    950: '#000000',
  },
}

SCSS

$custom: #51c8ee;
$custom-light: #93d8f3;
$custom-dark: #000000;

JSON

{
  "hex": "#51c8ee",
  "rgb": {
    "r": 81,
    "g": 200,
    "b": 238
  },
  "hsl": {
    "h": 194.522,
    "s": 82.199,
    "l": 62.549
  },
  "oklch": {
    "l": 0.78073,
    "c": 0.11781,
    "h": 222.6
  },
  "luminance": 0.49231
}

Semantic roles & 50–950 ramp

primary

#51C8EE

secondary

#EABFB1

accent

#3B07DF

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1417

muted

#7E8385

Preview Lab

Preview with #51C8EE

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

Preview Lab → · Contrast checker → · Palette generator →