#51D8F4#51D8F4

#51D8F4 is a very light, vivid cyan. Relative luminance 0.574; OKLCH L 82.0% C 0.121 H 214.2°. Best body text is #000000 at 12.48:1 contrast (WCAG AA passes).

Color values

HEX	#51D8F4
RGB	rgb(81, 216, 244)
HSL	hsl(190, 88%, 64%)
HSV	hsv(190, 67%, 96%)
CMYK	cmyk(66.8%, 11.5%, 0%, 4.3%)
CIE-LAB	lab(80.40, -27.92, -24.45)
CIE-LCH	lch(80.40, 37.11, 221.20°)
OKLab	oklab(82% -0.1002 -0.068)
OKLCH	oklch(82% 0.121 214.2)
XYZ	xyz(44.2715, 57.3878, 94.3141)
Luminance	0.5739 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51D8F4 #F46D51

analogous

#51F4BE #51D8F4 #5186F4

triadic

#51D8F4 #F451D8 #D8F451

tetradic

#51D8F4 #BE51F4 #F46D51 #86F451

square

#51D8F4 #BE51F4 #F46D51 #86F451

split-complementary

#51D8F4 #F45186 #F4BE51

monochromatic

#0CA0BF #17CBF0 #51D8F4 #8BE5F8 #C4F2FB

Accessibility & contrast

On white

1.68

#51D8F4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.48

#51D8F4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51D8F4

12.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51D8F4	#FFFFFF	#000000	##000000
##51D8F4	1.00	1.68	12.48	12.48
#FFFFFF	1.68	1.00	21.00	21.00
#000000	12.48	21.00	1.00	1.00
##000000	12.48	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C4D1F6

Deuteranopia (green-blind)

#ACC0F4

Tritanopia (blue-blind)

#00E3E1

Achromatopsia (no color)

#C7C7C7

Design tokens & code

CSS

--color: #51d8f4;
/* rgb */ color: rgb(81, 216, 244);
/* oklch */ color: oklch(82.0% 0.121 214.2);

Tailwind

colors: {
  custom: {
    50: '#94e4f7',
    500: '#51d8f4',
    950: '#000000',
  },
}

SCSS

$custom: #51d8f4;
$custom-light: #94e4f7;
$custom-dark: #000000;

JSON

{
  "hex": "#51d8f4",
  "rgb": {
    "r": 81,
    "g": 216,
    "b": 244
  },
  "hsl": {
    "h": 190.307,
    "s": 88.108,
    "l": 63.725
  },
  "oklch": {
    "l": 0.82,
    "c": 0.12112,
    "h": 214.2
  },
  "luminance": 0.57393
}

Semantic roles & 50–950 ramp

primary

#51D8F4

secondary

#BD452D

accent

#2801E5

background

#FCFEFF

surface

#F5FCFE

border

#CFD5D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #51D8F4

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

Preview Lab → · Contrast checker → · Palette generator →