#66D4FD#66D4FD

#66D4FD is a very light, moderate cyan. Relative luminance 0.570; OKLCH L 82.1% C 0.116 H 225.4°. Best body text is #000000 at 12.40:1 contrast (WCAG AA passes).

Color values

HEX	#66D4FD
RGB	rgb(102, 212, 253)
HSL	hsl(196, 97%, 70%)
HSV	hsv(196, 60%, 99%)
CMYK	cmyk(59.7%, 16.2%, 0%, 0.8%)
CIE-LAB	lab(80.18, -19.89, -29.51)
CIE-LCH	lch(80.18, 35.59, 236.02°)
OKLab	oklab(82.1% -0.0812 -0.0822)
OKLCH	oklch(82.1% 0.116 225.4)
XYZ	xyz(46.7456, 56.9990, 101.4479)
Luminance	0.5700 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D4FD #FD8F66

analogous

#66FDDA #66D4FD #6689FD

triadic

#66D4FD #FD66D4 #D4FD66

tetradic

#66D4FD #DA66FD #FD8F66 #89FD66

square

#66D4FD #DA66FD #FD8F66 #89FD66

split-complementary

#66D4FD #FD6689 #FDDA66

monochromatic

#03A8E6 #2AC3FC #66D4FD #A2E5FE #DFF6FF

Accessibility & contrast

On white

1.69

#66D4FD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.40

#66D4FD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D4FD

12.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D4FD	#FFFFFF	#000000	##000000
##66D4FD	1.00	1.69	12.40	12.40
#FFFFFF	1.69	1.00	21.00	21.00
#000000	12.40	21.00	1.00	1.00
##000000	12.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BED0FF

Deuteranopia (green-blind)

#A8C0FD

Tritanopia (blue-blind)

#00E0E1

Achromatopsia (no color)

#C7C7C7

Design tokens & code

CSS

--color: #66d4fd;
/* rgb */ color: rgb(102, 212, 253);
/* oklch */ color: oklch(82.1% 0.116 225.4);

Tailwind

colors: {
  custom: {
    50: '#9ee1fe',
    500: '#66d4fd',
    950: '#000000',
  },
}

SCSS

$custom: #66d4fd;
$custom-light: #9ee1fe;
$custom-dark: #000000;

JSON

{
  "hex": "#66d4fd",
  "rgb": {
    "r": 102,
    "g": 212,
    "b": 253
  },
  "hsl": {
    "h": 196.291,
    "s": 97.419,
    "l": 69.608
  },
  "oklch": {
    "l": 0.82099,
    "c": 0.11559,
    "h": 225.4
  },
  "luminance": 0.57004
}

Semantic roles & 50–950 ramp

primary

#66D4FD

secondary

#D85D2F

accent

#3E00E6

background

#FCFEFF

surface

#F6FCFF

border

#D0D5D7

text

#101517

muted

#808485

Preview Lab

Preview with #66D4FD

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

Preview Lab → · Contrast checker → · Palette generator →