#66DFF9#66DFF9

#66DFF9 is a very light, moderate cyan. Relative luminance 0.624; OKLCH L 84.4% C 0.113 H 214.0°. Best body text is #000000 at 13.49:1 contrast (WCAG AA passes).

Color values

HEX	#66DFF9
RGB	rgb(102, 223, 249)
HSL	hsl(191, 92%, 69%)
HSV	hsv(191, 59%, 98%)
CMYK	cmyk(59%, 10.4%, 0%, 2.4%)
CIE-LAB	lab(83.14, -26.54, -22.87)
CIE-LCH	lch(83.14, 35.03, 220.75°)
OKLab	oklab(84.43% -0.094 -0.0634)
OKLCH	oklch(84.43% 0.113 214)
XYZ	xyz(48.9591, 62.4348, 99.0751)
Luminance	0.6244 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66DFF9 #F98066

analogous

#66F9CA #66DFF9 #6696F9

triadic

#66DFF9 #F966DF #DFF966

tetradic

#66DFF9 #CA66F9 #F98066 #96F966

square

#66DFF9 #CA66F9 #F98066 #96F966

split-complementary

#66DFF9 #F96696 #F9CA66

monochromatic

#09B7DC #2BD3F7 #66DFF9 #A1EBFB #DCF8FE

Accessibility & contrast

On white

1.56

#66DFF9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

13.49

#66DFF9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66DFF9

13.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66DFF9	#FFFFFF	#000000	##000000
##66DFF9	1.00	1.56	13.49	13.49
#FFFFFF	1.56	1.00	21.00	21.00
#000000	13.49	21.00	1.00	1.00
##000000	13.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#CCD8FB

Deuteranopia (green-blind)

#B6C8F9

Tritanopia (blue-blind)

#00E9E7

Achromatopsia (no color)

#CFCFCF

Design tokens & code

CSS

--color: #66dff9;
/* rgb */ color: rgb(102, 223, 249);
/* oklch */ color: oklch(84.4% 0.113 214.0);

Tailwind

colors: {
  custom: {
    50: '#9fe9fb',
    500: '#66dff9',
    950: '#000000',
  },
}

SCSS

$custom: #66dff9;
$custom-light: #9fe9fb;
$custom-dark: #000000;

JSON

{
  "hex": "#66dff9",
  "rgb": {
    "r": 102,
    "g": 223,
    "b": 249
  },
  "hsl": {
    "h": 190.612,
    "s": 92.453,
    "l": 68.824
  },
  "oklch": {
    "l": 0.84428,
    "c": 0.11344,
    "h": 214
  },
  "luminance": 0.6244
}

Semantic roles & 50–950 ramp

primary

#66DFF9

secondary

#D34D30

accent

#2900E6

background

#FDFEFF

surface

#F7FDFF

border

#D0D5D7

text

#101617

muted

#818485

Preview Lab

Preview with #66DFF9

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

Preview Lab → · Contrast checker → · Palette generator →