#51CFF9#51CFF9

#51CFF9 is a light, vivid cyan. Relative luminance 0.532; OKLCH L 80.1% C 0.124 H 223.8°. Best body text is #000000 at 11.64:1 contrast (WCAG AA passes).

Color values

HEX	#51CFF9
RGB	rgb(81, 207, 249)
HSL	hsl(195, 93%, 65%)
HSV	hsv(195, 67%, 98%)
CMYK	cmyk(67.5%, 16.9%, 0%, 2.4%)
CIE-LAB	lab(78.00, -21.93, -30.78)
CIE-LCH	lch(78.00, 37.80, 234.53°)
OKLab	oklab(80.13% -0.0895 -0.086)
OKLCH	oklch(80.13% 0.124 223.8)
XYZ	xyz(42.7981, 53.2098, 97.6191)
Luminance	0.5322 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51CFF9 #F97B51

analogous

#51F9CF #51CFF9 #517BF9

triadic

#51CFF9 #F951CF #CFF951

tetradic

#51CFF9 #CF51F9 #F97B51 #7BF951

square

#51CFF9 #CF51F9 #F97B51 #7BF951

split-complementary

#51CFF9 #F9517B #F9CF51

monochromatic

#0798C9 #16BFF7 #51CFF9 #8CDFFB #C7F0FD

Accessibility & contrast

On white

1.80

#51CFF9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.64

#51CFF9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51CFF9

11.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51CFF9	#FFFFFF	#000000	##000000
##51CFF9	1.00	1.80	11.64	11.64
#FFFFFF	1.80	1.00	21.00	21.00
#000000	11.64	21.00	1.00	1.00
##000000	11.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B7CBFB

Deuteranopia (green-blind)

#A0B9F9

Tritanopia (blue-blind)

#00DCDD

Achromatopsia (no color)

#C1C1C1

Design tokens & code

CSS

--color: #51cff9;
/* rgb */ color: rgb(81, 207, 249);
/* oklch */ color: oklch(80.1% 0.124 223.8);

Tailwind

colors: {
  custom: {
    50: '#94ddfb',
    500: '#51cff9',
    950: '#000000',
  },
}

SCSS

$custom: #51cff9;
$custom-light: #94ddfb;
$custom-dark: #000000;

JSON

{
  "hex": "#51cff9",
  "rgb": {
    "r": 81,
    "g": 207,
    "b": 249
  },
  "hsl": {
    "h": 195,
    "s": 93.333,
    "l": 64.706
  },
  "oklch": {
    "l": 0.80134,
    "c": 0.12417,
    "h": 223.8
  },
  "luminance": 0.53215
}

Semantic roles & 50–950 ramp

primary

#51CFF9

secondary

#C55029

accent

#3900E6

background

#FCFEFF

surface

#F5FCFF

border

#CFD5D7

text

#0F1517

muted

#808485

Preview Lab

Preview with #51CFF9

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

Preview Lab → · Contrast checker → · Palette generator →