#51D9EF#51D9EF

#51D9EF is a very light, moderate teal. Relative luminance 0.576; OKLCH L 82.0% C 0.119 H 210.2°. Best body text is #000000 at 12.52:1 contrast (WCAG AA passes).

Color values

HEX	#51D9EF
RGB	rgb(81, 217, 239)
HSL	hsl(188, 83%, 63%)
HSV	hsv(188, 66%, 94%)
CMYK	cmyk(66.1%, 9.2%, 0%, 6.3%)
CIE-LAB	lab(80.52, -29.88, -21.60)
CIE-LCH	lch(80.52, 36.87, 215.87°)
OKLab	oklab(82.04% -0.1031 -0.06)
OKLCH	oklch(82.04% 0.119 210.2)
XYZ	xyz(43.7796, 57.6022, 90.4557)
Luminance	0.5761 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51D9EF #EF6751

analogous

#51EFB6 #51D9EF #518AEF

triadic

#51D9EF #EF51D9 #D9EF51

tetradic

#51D9EF #B651EF #EF6751 #8AEF51

square

#51D9EF #B651EF #EF6751 #8AEF51

split-complementary

#51D9EF #EF518A #EFB651

monochromatic

#119EB5 #19CDEA #51D9EF #89E5F4 #C1F1F9

Accessibility & contrast

On white

1.68

#51D9EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.52

#51D9EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51D9EF

12.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51D9EF	#FFFFFF	#000000	##000000
##51D9EF	1.00	1.68	12.52	12.52
#FFFFFF	1.68	1.00	21.00	21.00
#000000	12.52	21.00	1.00	1.00
##000000	12.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C6D1F0

Deuteranopia (green-blind)

#AFC1EF

Tritanopia (blue-blind)

#00E3E0

Achromatopsia (no color)

#C8C8C8

Design tokens & code

CSS

--color: #51d9ef;
/* rgb */ color: rgb(81, 217, 239);
/* oklch */ color: oklch(82.0% 0.119 210.2);

Tailwind

colors: {
  custom: {
    50: '#94e5f4',
    500: '#51d9ef',
    950: '#000000',
  },
}

SCSS

$custom: #51d9ef;
$custom-light: #94e5f4;
$custom-dark: #000000;

JSON

{
  "hex": "#51d9ef",
  "rgb": {
    "r": 81,
    "g": 217,
    "b": 239
  },
  "hsl": {
    "h": 188.354,
    "s": 83.158,
    "l": 62.745
  },
  "oklch": {
    "l": 0.82041,
    "c": 0.11934,
    "h": 210.2
  },
  "luminance": 0.57607
}

Semantic roles & 50–950 ramp

primary

#51D9EF

secondary

#B54230

accent

#2406E0

background

#FCFEFF

surface

#F5FCFE

border

#CFD5D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #51D9EF

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

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