#66D4F9#66D4F9

#66D4F9 is a light, moderate cyan. Relative luminance 0.568; OKLCH L 81.9% C 0.113 H 222.9°. Best body text is #000000 at 12.35:1 contrast (WCAG AA passes).

Color values

HEX	#66D4F9
RGB	rgb(102, 212, 249)
HSL	hsl(195, 92%, 69%)
HSV	hsv(195, 59%, 98%)
CMYK	cmyk(59%, 14.9%, 0%, 2.4%)
CIE-LAB	lab(80.04, -21.06, -27.60)
CIE-LCH	lch(80.04, 34.72, 232.66°)
OKLab	oklab(81.94% -0.0827 -0.0768)
OKLCH	oklch(81.94% 0.113 222.9)
XYZ	xyz(46.1151, 56.7468, 98.1271)
Luminance	0.5675 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D4F9 #F98B66

analogous

#66F9D5 #66D4F9 #668BF9

triadic

#66D4F9 #F966D4 #D4F966

tetradic

#66D4F9 #D566F9 #F98B66 #8BF966

square

#66D4F9 #D566F9 #F98B66 #8BF966

split-complementary

#66D4F9 #F9668B #F9D566

monochromatic

#09A7DC #2BC3F7 #66D4F9 #A1E5FB #DCF5FE

Accessibility & contrast

On white

1.70

#66D4F9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.35

#66D4F9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D4F9

12.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D4F9	#FFFFFF	#000000	##000000
##66D4F9	1.00	1.70	12.35	12.35
#FFFFFF	1.70	1.00	21.00	21.00
#000000	12.35	21.00	1.00	1.00
##000000	12.35	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BFCFFB

Deuteranopia (green-blind)

#AAC0F9

Tritanopia (blue-blind)

#00E0E0

Achromatopsia (no color)

#C6C6C6

Design tokens & code

CSS

--color: #66d4f9;
/* rgb */ color: rgb(102, 212, 249);
/* oklch */ color: oklch(81.9% 0.113 222.9);

Tailwind

colors: {
  custom: {
    50: '#9ee1fb',
    500: '#66d4f9',
    950: '#000000',
  },
}

SCSS

$custom: #66d4f9;
$custom-light: #9ee1fb;
$custom-dark: #000000;

JSON

{
  "hex": "#66d4f9",
  "rgb": {
    "r": 102,
    "g": 212,
    "b": 249
  },
  "hsl": {
    "h": 195.102,
    "s": 92.453,
    "l": 68.824
  },
  "oklch": {
    "l": 0.81939,
    "c": 0.11285,
    "h": 222.9
  },
  "luminance": 0.56751
}

Semantic roles & 50–950 ramp

primary

#66D4F9

secondary

#D35930

accent

#3A00E6

background

#FCFEFF

surface

#F6FCFF

border

#D0D5D7

text

#101517

muted

#808485

Preview Lab

Preview with #66D4F9

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

Preview Lab → · Contrast checker → · Palette generator →