#51D4F4#51D4F4

#51D4F4 is a light, vivid cyan. Relative luminance 0.554; OKLCH L 81.1% C 0.121 H 217.2°. Best body text is #000000 at 12.07:1 contrast (WCAG AA passes).

Color values

HEX	#51D4F4
RGB	rgb(81, 212, 244)
HSL	hsl(192, 88%, 64%)
HSV	hsv(192, 67%, 96%)
CMYK	cmyk(66.8%, 13.1%, 0%, 4.3%)
CIE-LAB	lab(79.25, -25.95, -26.20)
CIE-LCH	lch(79.25, 36.88, 225.27°)
OKLab	oklab(81.08% -0.0963 -0.073)
OKLCH	oklch(81.08% 0.121 217.2)
XYZ	xyz(43.2592, 55.3631, 93.9767)
Luminance	0.5537 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51D4F4 #F47151

analogous

#51F4C2 #51D4F4 #5182F4

triadic

#51D4F4 #F451D4 #D4F451

tetradic

#51D4F4 #C251F4 #F47151 #82F451

square

#51D4F4 #C251F4 #F47151 #82F451

split-complementary

#51D4F4 #F45182 #F4C251

monochromatic

#0C9CBF #17C6F0 #51D4F4 #8BE2F8 #C4F0FB

Accessibility & contrast

On white

1.74

#51D4F4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.07

#51D4F4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51D4F4

12.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51D4F4	#FFFFFF	#000000	##000000
##51D4F4	1.00	1.74	12.07	12.07
#FFFFFF	1.74	1.00	21.00	21.00
#000000	12.07	21.00	1.00	1.00
##000000	12.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BFCEF6

Deuteranopia (green-blind)

#A8BDF4

Tritanopia (blue-blind)

#00DFDE

Achromatopsia (no color)

#C4C4C4

Design tokens & code

CSS

--color: #51d4f4;
/* rgb */ color: rgb(81, 212, 244);
/* oklch */ color: oklch(81.1% 0.121 217.2);

Tailwind

colors: {
  custom: {
    50: '#94e1f7',
    500: '#51d4f4',
    950: '#000000',
  },
}

SCSS

$custom: #51d4f4;
$custom-light: #94e1f7;
$custom-dark: #000000;

JSON

{
  "hex": "#51d4f4",
  "rgb": {
    "r": 81,
    "g": 212,
    "b": 244
  },
  "hsl": {
    "h": 191.779,
    "s": 88.108,
    "l": 63.725
  },
  "oklch": {
    "l": 0.81078,
    "c": 0.12082,
    "h": 217.2
  },
  "luminance": 0.55368
}

Semantic roles & 50–950 ramp

primary

#51D4F4

secondary

#BD492D

accent

#2E01E5

background

#FCFEFF

surface

#F5FCFE

border

#CFD5D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #51D4F4

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

Preview Lab → · Contrast checker → · Palette generator →