#51D7FF#51D7FF

#51D7FF is a very light, vivid cyan. Relative luminance 0.576; OKLCH L 82.2% C 0.127 H 221.5°. Best body text is #000000 at 12.51:1 contrast (WCAG AA passes).

Color values

HEX	#51D7FF
RGB	rgb(81, 215, 255)
HSL	hsl(194, 100%, 66%)
HSV	hsv(194, 68%, 100%)
CMYK	cmyk(68.2%, 15.7%, 0%, 0%)
CIE-LAB	lab(80.50, -24.12, -30.14)
CIE-LCH	lch(80.50, 38.60, 231.33°)
OKLab	oklab(82.21% -0.0951 -0.0842)
OKLCH	oklch(82.21% 0.127 221.5)
XYZ	xyz(45.7364, 57.5651, 103.2891)
Luminance	0.5757 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51D7FF #FF7951

analogous

#51FFD0 #51D7FF #5180FF

triadic

#51D7FF #FF51D7 #D7FF51

tetradic

#51D7FF #D051FF #FF7951 #80FF51

square

#51D7FF #D051FF #FF7951 #80FF51

split-complementary

#51D7FF #FF5180 #FFD051

monochromatic

#00A4D6 #14C9FF #51D7FF #8EE5FF #CBF3FF

Accessibility & contrast

On white

1.68

#51D7FF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.51

#51D7FF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51D7FF

12.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51D7FF	#FFFFFF	#000000	##000000
##51D7FF	1.00	1.68	12.51	12.51
#FFFFFF	1.68	1.00	21.00	21.00
#000000	12.51	21.00	1.00	1.00
##000000	12.51	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BFD2FF

Deuteranopia (green-blind)

#A7C0FF

Tritanopia (blue-blind)

#00E4E4

Achromatopsia (no color)

#C8C8C8

Design tokens & code

CSS

--color: #51d7ff;
/* rgb */ color: rgb(81, 215, 255);
/* oklch */ color: oklch(82.2% 0.127 221.5);

Tailwind

colors: {
  custom: {
    50: '#96e3ff',
    500: '#51d7ff',
    950: '#000000',
  },
}

SCSS

$custom: #51d7ff;
$custom-light: #96e3ff;
$custom-dark: #000000;

JSON

{
  "hex": "#51d7ff",
  "rgb": {
    "r": 81,
    "g": 215,
    "b": 255
  },
  "hsl": {
    "h": 193.793,
    "s": 100,
    "l": 65.882
  },
  "oklch": {
    "l": 0.82207,
    "c": 0.12701,
    "h": 221.5
  },
  "luminance": 0.5757
}

Semantic roles & 50–950 ramp

primary

#51D7FF

secondary

#D04C25

accent

#3500E6

background

#FCFEFF

surface

#F5FCFF

border

#CFD5D7

text

#0F1518

muted

#808486

Preview Lab

Preview with #51D7FF

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

Preview Lab → · Contrast checker → · Palette generator →