#66CDF8#66CDF8

#66CDF8 is a light, moderate cyan. Relative luminance 0.533; OKLCH L 80.3% C 0.113 H 228.0°. Best body text is #000000 at 11.65:1 contrast (WCAG AA passes).

Color values

HEX	#66CDF8
RGB	rgb(102, 205, 248)
HSL	hsl(198, 91%, 69%)
HSV	hsv(198, 59%, 97%)
CMYK	cmyk(58.9%, 17.3%, 0%, 2.7%)
CIE-LAB	lab(78.03, -17.78, -30.15)
CIE-LCH	lch(78.03, 35.00, 239.47°)
OKLab	oklab(80.32% -0.0757 -0.0841)
OKLCH	oklch(80.32% 0.113 228)
XYZ	xyz(44.2475, 53.2604, 96.7372)
Luminance	0.5326 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CDF8 #F89166

analogous

#66F8DA #66CDF8 #6684F8

triadic

#66CDF8 #F866CD #CDF866

tetradic

#66CDF8 #DA66F8 #F89166 #84F866

square

#66CDF8 #DA66F8 #F89166 #84F866

split-complementary

#66CDF8 #F86684 #F8DA66

monochromatic

#0A9CDA #2BBAF5 #66CDF8 #A1E0FB #DBF3FD

Accessibility & contrast

On white

1.80

#66CDF8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.65

#66CDF8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CDF8

11.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CDF8	#FFFFFF	#000000	##000000
##66CDF8	1.00	1.80	11.65	11.65
#FFFFFF	1.80	1.00	21.00	21.00
#000000	11.65	21.00	1.00	1.00
##000000	11.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B6CAFA

Deuteranopia (green-blind)

#A2BAF7

Tritanopia (blue-blind)

#00D9DB

Achromatopsia (no color)

#C1C1C1

Design tokens & code

CSS

--color: #66cdf8;
/* rgb */ color: rgb(102, 205, 248);
/* oklch */ color: oklch(80.3% 0.113 228.0);

Tailwind

colors: {
  custom: {
    50: '#9ddcfa',
    500: '#66cdf8',
    950: '#000000',
  },
}

SCSS

$custom: #66cdf8;
$custom-light: #9ddcfa;
$custom-dark: #000000;

JSON

{
  "hex": "#66cdf8",
  "rgb": {
    "r": 102,
    "g": 205,
    "b": 248
  },
  "hsl": {
    "h": 197.671,
    "s": 91.25,
    "l": 68.627
  },
  "oklch": {
    "l": 0.80323,
    "c": 0.11316,
    "h": 228
  },
  "luminance": 0.53265
}

Semantic roles & 50–950 ramp

primary

#66CDF8

secondary

#D26031

accent

#4400E6

background

#FCFEFF

surface

#F6FCFF

border

#D0D5D7

text

#0F1517

muted

#808485

Preview Lab

Preview with #66CDF8

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

Preview Lab → · Contrast checker → · Palette generator →