#66CFF9#66CFF9

#66CFF9 is a light, moderate cyan. Relative luminance 0.543; OKLCH L 80.8% C 0.114 H 227.0°. Best body text is #000000 at 11.86:1 contrast (WCAG AA passes).

Color values

HEX	#66CFF9
RGB	rgb(102, 207, 249)
HSL	hsl(197, 92%, 69%)
HSV	hsv(197, 59%, 98%)
CMYK	cmyk(59%, 16.9%, 0%, 2.4%)
CIE-LAB	lab(78.63, -18.52, -29.76)
CIE-LCH	lch(78.63, 35.05, 238.12°)
OKLab	oklab(80.81% -0.0775 -0.083)
OKLCH	oklch(80.81% 0.114 227)
XYZ	xyz(44.8845, 54.2856, 97.7169)
Luminance	0.5429 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CFF9 #F99066

analogous

#66F9DA #66CFF9 #6686F9

triadic

#66CFF9 #F966CF #CFF966

tetradic

#66CFF9 #DA66F9 #F99066 #86F966

square

#66CFF9 #DA66F9 #F99066 #86F966

split-complementary

#66CFF9 #F96686 #F9DA66

monochromatic

#09A0DC #2BBDF7 #66CFF9 #A1E1FB #DCF4FE

Accessibility & contrast

On white

1.77

#66CFF9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.86

#66CFF9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CFF9

11.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CFF9	#FFFFFF	#000000	##000000
##66CFF9	1.00	1.77	11.86	11.86
#FFFFFF	1.77	1.00	21.00	21.00
#000000	11.86	21.00	1.00	1.00
##000000	11.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B9CBFB

Deuteranopia (green-blind)

#A4BCF9

Tritanopia (blue-blind)

#00DBDD

Achromatopsia (no color)

#C3C3C3

Design tokens & code

CSS

--color: #66cff9;
/* rgb */ color: rgb(102, 207, 249);
/* oklch */ color: oklch(80.8% 0.114 227.0);

Tailwind

colors: {
  custom: {
    50: '#9eddfb',
    500: '#66cff9',
    950: '#000000',
  },
}

SCSS

$custom: #66cff9;
$custom-light: #9eddfb;
$custom-dark: #000000;

JSON

{
  "hex": "#66cff9",
  "rgb": {
    "r": 102,
    "g": 207,
    "b": 249
  },
  "hsl": {
    "h": 197.143,
    "s": 92.453,
    "l": 68.824
  },
  "oklch": {
    "l": 0.80813,
    "c": 0.11351,
    "h": 227
  },
  "luminance": 0.5429
}

Semantic roles & 50–950 ramp

primary

#66CFF9

secondary

#D35F30

accent

#4200E6

background

#FCFEFF

surface

#F6FCFF

border

#D0D5D7

text

#0F1517

muted

#808485

Preview Lab

Preview with #66CFF9

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

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