#51E9EF#51E9EF

#51E9EF is a very light, vivid teal. Relative luminance 0.663; OKLCH L 85.8% C 0.126 H 198.9°. Best body text is #000000 at 14.25:1 contrast (WCAG AA passes).

Color values

HEX	#51E9EF
RGB	rgb(81, 233, 239)
HSL	hsl(182, 83%, 63%)
HSV	hsv(182, 66%, 94%)
CMYK	cmyk(66.1%, 2.5%, 0%, 6.3%)
CIE-LAB	lab(85.13, -37.42, -14.65)
CIE-LCH	lch(85.13, 40.19, 201.38°)
OKLab	oklab(85.76% -0.1189 -0.0406)
OKLCH	oklch(85.76% 0.126 198.9)
XYZ	xyz(48.1054, 66.2537, 91.8976)
Luminance	0.6626 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51E9EF #EF5751

analogous

#51EFA6 #51E9EF #519AEF

triadic

#51E9EF #EF51E9 #E9EF51

tetradic

#51E9EF #A651EF #EF5751 #9AEF51

square

#51E9EF #A651EF #EF5751 #9AEF51

split-complementary

#51E9EF #EF519A #EFA651

monochromatic

#11AFB5 #19E2EA #51E9EF #89F0F4 #C1F7F9

Accessibility & contrast

On white

1.47

#51E9EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

14.25

#51E9EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51E9EF

14.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51E9EF	#FFFFFF	#000000	##000000
##51E9EF	1.00	1.47	14.25	14.25
#FFFFFF	1.47	1.00	21.00	21.00
#000000	14.25	21.00	1.00	1.00
##000000	14.25	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D9DFF0

Deuteranopia (green-blind)

#C1CDF0

Tritanopia (blue-blind)

#00F1EA

Achromatopsia (no color)

#D5D5D5

Design tokens & code

CSS

--color: #51e9ef;
/* rgb */ color: rgb(81, 233, 239);
/* oklch */ color: oklch(85.8% 0.126 198.9);

Tailwind

colors: {
  custom: {
    50: '#95f0f4',
    500: '#51e9ef',
    950: '#000000',
  },
}

SCSS

$custom: #51e9ef;
$custom-light: #95f0f4;
$custom-dark: #000000;

JSON

{
  "hex": "#51e9ef",
  "rgb": {
    "r": 81,
    "g": 233,
    "b": 239
  },
  "hsl": {
    "h": 182.278,
    "s": 83.158,
    "l": 62.745
  },
  "oklch": {
    "l": 0.85762,
    "c": 0.12562,
    "h": 198.9
  },
  "luminance": 0.66259
}

Semantic roles & 50–950 ramp

primary

#51E9EF

secondary

#B53530

accent

#0E06E0

background

#FCFFFF

surface

#F5FEFE

border

#CFD6D6

text

#0F1617

muted

#808585

Preview Lab

Preview with #51E9EF

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

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