#51DDEF#51DDEF

#51DDEF is a very light, vivid teal. Relative luminance 0.597; OKLCH L 83.0% C 0.120 H 207.2°. Best body text is #000000 at 12.94:1 contrast (WCAG AA passes).

Color values

HEX	#51DDEF
RGB	rgb(81, 221, 239)
HSL	hsl(187, 83%, 63%)
HSV	hsv(187, 66%, 94%)
CMYK	cmyk(66.1%, 7.5%, 0%, 6.3%)
CIE-LAB	lab(81.67, -31.80, -19.86)
CIE-LCH	lch(81.67, 37.49, 211.98°)
OKLab	oklab(82.97% -0.1071 -0.0551)
OKLCH	oklch(82.97% 0.12 207.2)
XYZ	xyz(44.8231, 59.6892, 90.8035)
Luminance	0.5969 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51DDEF #EF6351

analogous

#51EFB2 #51DDEF #518EEF

triadic

#51DDEF #EF51DD #DDEF51

tetradic

#51DDEF #B251EF #EF6351 #8EEF51

square

#51DDEF #B251EF #EF6351 #8EEF51

split-complementary

#51DDEF #EF518E #EFB251

monochromatic

#11A2B5 #19D2EA #51DDEF #89E8F4 #C1F3F9

Accessibility & contrast

On white

1.62

#51DDEF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.94

#51DDEF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51DDEF

12.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51DDEF	#FFFFFF	#000000	##000000
##51DDEF	1.00	1.62	12.94	12.94
#FFFFFF	1.62	1.00	21.00	21.00
#000000	12.94	21.00	1.00	1.00
##000000	12.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#CBD5F0

Deuteranopia (green-blind)

#B4C4EF

Tritanopia (blue-blind)

#00E6E2

Achromatopsia (no color)

#CBCBCB

Design tokens & code

CSS

--color: #51ddef;
/* rgb */ color: rgb(81, 221, 239);
/* oklch */ color: oklch(83.0% 0.120 207.2);

Tailwind

colors: {
  custom: {
    50: '#94e8f4',
    500: '#51ddef',
    950: '#000000',
  },
}

SCSS

$custom: #51ddef;
$custom-light: #94e8f4;
$custom-dark: #000000;

JSON

{
  "hex": "#51ddef",
  "rgb": {
    "r": 81,
    "g": 221,
    "b": 239
  },
  "hsl": {
    "h": 186.835,
    "s": 83.158,
    "l": 62.745
  },
  "oklch": {
    "l": 0.82969,
    "c": 0.12044,
    "h": 207.2
  },
  "luminance": 0.59694
}

Semantic roles & 50–950 ramp

primary

#51DDEF

secondary

#B53F30

accent

#1F06E0

background

#FCFEFF

surface

#F5FCFE

border

#CFD5D6

text

#0F1617

muted

#808485

Preview Lab

Preview with #51DDEF

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

Preview Lab → · Contrast checker → · Palette generator →