#66ACF5#66ACF5

#66ACF5 is a light, vivid cyan. Relative luminance 0.389; OKLCH L 72.9% C 0.128 H 250.9°. Best body text is #000000 at 8.78:1 contrast (WCAG AA passes).

Color values

HEX	#66ACF5
RGB	rgb(102, 172, 245)
HSL	hsl(211, 88%, 68%)
HSV	hsv(211, 58%, 96%)
CMYK	cmyk(58.4%, 29.8%, 0%, 3.9%)
CIE-LAB	lab(68.69, -0.94, -43.02)
CIE-LCH	lch(68.69, 43.03, 268.75°)
OKLab	oklab(72.89% -0.042 -0.1212)
OKLCH	oklch(72.89% 0.128 250.9)
XYZ	xyz(36.7075, 38.9191, 91.9462)
Luminance	0.3892 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ACF5 #F5AF66

analogous

#66F4F5 #66ACF5 #6766F5

triadic

#66ACF5 #F566AC #ACF566

tetradic

#66ACF5 #F566F4 #F5AF66 #66F567

square

#66ACF5 #F566F4 #F5AF66 #66F567

split-complementary

#66ACF5 #F56766 #F4F566

monochromatic

#0E6ED3 #2D8DF1 #66ACF5 #9FCBF9 #D9EAFD

Accessibility & contrast

On white

2.39

#66ACF5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.78

#66ACF5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ACF5

8.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ACF5	#FFFFFF	#000000	##000000
##66ACF5	1.00	2.39	8.78	8.78
#FFFFFF	2.39	1.00	21.00	21.00
#000000	8.78	21.00	1.00	1.00
##000000	8.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8DAFF8

Deuteranopia (green-blind)

#7AA1F4

Tritanopia (blue-blind)

#00BDC6

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #66acf5;
/* rgb */ color: rgb(102, 172, 245);
/* oklch */ color: oklch(72.9% 0.128 250.9);

Tailwind

colors: {
  custom: {
    50: '#9cc4f8',
    500: '#66acf5',
    950: '#000000',
  },
}

SCSS

$custom: #66acf5;
$custom-light: #9cc4f8;
$custom-dark: #000000;

JSON

{
  "hex": "#66acf5",
  "rgb": {
    "r": 102,
    "g": 172,
    "b": 245
  },
  "hsl": {
    "h": 210.629,
    "s": 87.73,
    "l": 68.039
  },
  "oklch": {
    "l": 0.72893,
    "c": 0.1283,
    "h": 250.9
  },
  "luminance": 0.38922
}

Semantic roles & 50–950 ramp

primary

#66ACF5

secondary

#F1DCC6

accent

#7501E4

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66ACF5

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

Preview Lab → · Contrast checker → · Palette generator →