#66D1FE#66D1FE

#66D1FE is a light, moderate cyan. Relative luminance 0.556; OKLCH L 81.5% C 0.117 H 228.3°. Best body text is #000000 at 12.12:1 contrast (WCAG AA passes).

Color values

HEX	#66D1FE
RGB	rgb(102, 209, 254)
HSL	hsl(198, 99%, 70%)
HSV	hsv(198, 60%, 100%)
CMYK	cmyk(59.8%, 17.7%, 0%, 0.4%)
CIE-LAB	lab(79.37, -18.06, -31.28)
CIE-LCH	lch(79.37, 36.13, 240.00°)
OKLab	oklab(81.47% -0.0778 -0.0873)
OKLCH	oklch(81.47% 0.117 228.3)
XYZ	xyz(46.1624, 55.5769, 102.0414)
Luminance	0.5558 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D1FE #FE9366

analogous

#66FEDF #66D1FE #6685FE

triadic

#66D1FE #FE66D1 #D1FE66

tetradic

#66D1FE #DF66FE #FE9366 #85FE66

square

#66D1FE #DF66FE #FE9366 #85FE66

split-complementary

#66D1FE #FE6685 #FEDF66

monochromatic

#02A4E8 #29BFFE #66D1FE #A3E3FE #E0F6FF

Accessibility & contrast

On white

1.73

#66D1FE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.12

#66D1FE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D1FE

12.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D1FE	#FFFFFF	#000000	##000000
##66D1FE	1.00	1.73	12.12	12.12
#FFFFFF	1.73	1.00	21.00	21.00
#000000	12.12	21.00	1.00	1.00
##000000	12.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BACEFF

Deuteranopia (green-blind)

#A4BEFD

Tritanopia (blue-blind)

#00DEE0

Achromatopsia (no color)

#C5C5C5

Design tokens & code

CSS

--color: #66d1fe;
/* rgb */ color: rgb(102, 209, 254);
/* oklch */ color: oklch(81.5% 0.117 228.3);

Tailwind

colors: {
  custom: {
    50: '#9edfff',
    500: '#66d1fe',
    950: '#000000',
  },
}

SCSS

$custom: #66d1fe;
$custom-light: #9edfff;
$custom-dark: #000000;

JSON

{
  "hex": "#66d1fe",
  "rgb": {
    "r": 102,
    "g": 209,
    "b": 254
  },
  "hsl": {
    "h": 197.763,
    "s": 98.701,
    "l": 69.804
  },
  "oklch": {
    "l": 0.81468,
    "c": 0.1169,
    "h": 228.3
  },
  "luminance": 0.55581
}

Semantic roles & 50–950 ramp

primary

#66D1FE

secondary

#D9612F

accent

#4400E6

background

#FCFEFF

surface

#F6FCFF

border

#D0D5D7

text

#101518

muted

#808486

Preview Lab

Preview with #66D1FE

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

Preview Lab → · Contrast checker → · Palette generator →