#66D7EE#66D7EE

#66D7EE is a very light, moderate cyan. Relative luminance 0.576; OKLCH L 82.2% C 0.107 H 212.9°. Best body text is #000000 at 12.52:1 contrast (WCAG AA passes).

Color values

HEX	#66D7EE
RGB	rgb(102, 215, 238)
HSL	hsl(190, 80%, 67%)
HSV	hsv(190, 57%, 93%)
CMYK	cmyk(57.1%, 9.7%, 0%, 6.7%)
CIE-LAB	lab(80.51, -25.71, -21.02)
CIE-LCH	lch(80.51, 33.21, 219.27°)
OKLab	oklab(82.2% -0.0899 -0.0582)
OKLCH	oklch(82.2% 0.107 212.9)
XYZ	xyz(45.2063, 57.5943, 89.6068)
Luminance	0.5760 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D7EE #EE7D66

analogous

#66EEC1 #66D7EE #6693EE

triadic

#66D7EE #EE66D7 #D7EE66

tetradic

#66D7EE #C166EE #EE7D66 #93EE66

square

#66D7EE #C166EE #EE7D66 #93EE66

split-complementary

#66D7EE #EE6693 #EEC166

monochromatic

#16A6C4 #2FC9E8 #66D7EE #9DE5F4 #D4F4FA

Accessibility & contrast

On white

1.68

#66D7EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.52

#66D7EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D7EE

12.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D7EE	#FFFFFF	#000000	##000000
##66D7EE	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)

#C5D1EF

Deuteranopia (green-blind)

#B1C1EE

Tritanopia (blue-blind)

#00E0DE

Achromatopsia (no color)

#C8C8C8

Design tokens & code

CSS

--color: #66d7ee;
/* rgb */ color: rgb(102, 215, 238);
/* oklch */ color: oklch(82.2% 0.107 212.9);

Tailwind

colors: {
  custom: {
    50: '#9de3f3',
    500: '#66d7ee',
    950: '#000000',
  },
}

SCSS

$custom: #66d7ee;
$custom-light: #9de3f3;
$custom-dark: #000000;

JSON

{
  "hex": "#66d7ee",
  "rgb": {
    "r": 102,
    "g": 215,
    "b": 238
  },
  "hsl": {
    "h": 190.147,
    "s": 80,
    "l": 66.667
  },
  "oklch": {
    "l": 0.82196,
    "c": 0.10716,
    "h": 212.9
  },
  "luminance": 0.57599
}

Semantic roles & 50–950 ramp

primary

#66D7EE

secondary

#C24E37

accent

#2D09DC

background

#FCFEFF

surface

#F6FCFE

border

#D0D5D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #66D7EE

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

Preview Lab → · Contrast checker → · Palette generator →