#51C8F0#51C8F0

#51C8F0 is a light, moderate cyan. Relative luminance 0.493; OKLCH L 78.2% C 0.119 H 223.8°. Best body text is #000000 at 10.87:1 contrast (WCAG AA passes).

Color values

HEX	#51C8F0
RGB	rgb(81, 200, 240)
HSL	hsl(195, 84%, 63%)
HSV	hsv(195, 66%, 94%)
CMYK	cmyk(66.3%, 16.7%, 0%, 5.9%)
CIE-LAB	lab(75.67, -21.14, -29.55)
CIE-LCH	lch(75.67, 36.33, 234.42°)
OKLab	oklab(78.16% -0.0859 -0.0825)
OKLCH	oklch(78.16% 0.119 223.8)
XYZ	xyz(39.7694, 49.3448, 89.8498)
Luminance	0.4935 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C8F0 #F07951

analogous

#51F0C8 #51C8F0 #5179F0

triadic

#51C8F0 #F051C8 #C8F051

tetradic

#51C8F0 #C851F0 #F07951 #79F051

square

#51C8F0 #C851F0 #F07951 #79F051

split-complementary

#51C8F0 #F05179 #F0C851

monochromatic

#108DB7 #19B6EB #51C8F0 #89DAF5 #C2ECFA

Accessibility & contrast

On white

1.93

#51C8F0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.87

#51C8F0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C8F0

10.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C8F0	#FFFFFF	#000000	##000000
##51C8F0	1.00	1.93	10.87	10.87
#FFFFFF	1.93	1.00	21.00	21.00
#000000	10.87	21.00	1.00	1.00
##000000	10.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B1C4F2

Deuteranopia (green-blind)

#9BB3F0

Tritanopia (blue-blind)

#00D4D5

Achromatopsia (no color)

#BABABA

Design tokens & code

CSS

--color: #51c8f0;
/* rgb */ color: rgb(81, 200, 240);
/* oklch */ color: oklch(78.2% 0.119 223.8);

Tailwind

colors: {
  custom: {
    50: '#93d8f5',
    500: '#51c8f0',
    950: '#000000',
  },
}

SCSS

$custom: #51c8f0;
$custom-light: #93d8f5;
$custom-dark: #000000;

JSON

{
  "hex": "#51c8f0",
  "rgb": {
    "r": 81,
    "g": 200,
    "b": 240
  },
  "hsl": {
    "h": 195.094,
    "s": 84.127,
    "l": 62.941
  },
  "oklch": {
    "l": 0.78156,
    "c": 0.11915,
    "h": 223.8
  },
  "luminance": 0.49349
}

Semantic roles & 50–950 ramp

primary

#51C8F0

secondary

#EBC0B2

accent

#3C05E1

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1417

muted

#7E8385

Preview Lab

Preview with #51C8F0

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

Preview Lab → · Contrast checker → · Palette generator →