#51CBF9#51CBF9

#51CBF9 is a light, vivid cyan. Relative luminance 0.513; OKLCH L 79.2% C 0.125 H 226.8°. Best body text is #000000 at 11.26:1 contrast (WCAG AA passes).

Color values

HEX	#51CBF9
RGB	rgb(81, 203, 249)
HSL	hsl(196, 93%, 65%)
HSV	hsv(196, 67%, 98%)
CMYK	cmyk(67.5%, 18.5%, 0%, 2.4%)
CIE-LAB	lab(76.86, -19.89, -32.54)
CIE-LCH	lch(76.86, 38.14, 238.56°)
OKLab	oklab(79.22% -0.0856 -0.0911)
OKLCH	oklch(79.22% 0.125 226.8)
XYZ	xyz(41.8413, 51.2961, 97.3002)
Luminance	0.5130 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51CBF9 #F97F51

analogous

#51F9D3 #51CBF9 #5177F9

triadic

#51CBF9 #F951CB #CBF951

tetradic

#51CBF9 #D351F9 #F97F51 #77F951

square

#51CBF9 #D351F9 #F97F51 #77F951

split-complementary

#51CBF9 #F95177 #F9D351

monochromatic

#0794C9 #16B9F7 #51CBF9 #8CDDFB #C7EEFD

Accessibility & contrast

On white

1.86

#51CBF9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.26

#51CBF9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51CBF9

11.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51CBF9	#FFFFFF	#000000	##000000
##51CBF9	1.00	1.86	11.26	11.26
#FFFFFF	1.86	1.00	21.00	21.00
#000000	11.26	21.00	1.00	1.00
##000000	11.26	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B2C7FB

Deuteranopia (green-blind)

#9BB6F8

Tritanopia (blue-blind)

#00D8DA

Achromatopsia (no color)

#BEBEBE

Design tokens & code

CSS

--color: #51cbf9;
/* rgb */ color: rgb(81, 203, 249);
/* oklch */ color: oklch(79.2% 0.125 226.8);

Tailwind

colors: {
  custom: {
    50: '#94dbfb',
    500: '#51cbf9',
    950: '#000000',
  },
}

SCSS

$custom: #51cbf9;
$custom-light: #94dbfb;
$custom-dark: #000000;

JSON

{
  "hex": "#51cbf9",
  "rgb": {
    "r": 81,
    "g": 203,
    "b": 249
  },
  "hsl": {
    "h": 196.429,
    "s": 93.333,
    "l": 64.706
  },
  "oklch": {
    "l": 0.79221,
    "c": 0.12501,
    "h": 226.8
  },
  "luminance": 0.51301
}

Semantic roles & 50–950 ramp

primary

#51CBF9

secondary

#C55429

accent

#3F00E6

background

#FCFEFF

surface

#F5FBFF

border

#CFD4D7

text

#0F1517

muted

#808485

Preview Lab

Preview with #51CBF9

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

Preview Lab → · Contrast checker → · Palette generator →