#66ACF4#66ACF4

#66ACF4 is a light, vivid cyan. Relative luminance 0.389; OKLCH L 72.8% C 0.127 H 250.6°. Best body text is #000000 at 8.77:1 contrast (WCAG AA passes).

Color values

HEX	#66ACF4
RGB	rgb(102, 172, 244)
HSL	hsl(210, 87%, 68%)
HSV	hsv(210, 58%, 96%)
CMYK	cmyk(58.2%, 29.5%, 0%, 4.3%)
CIE-LAB	lab(68.65, -1.25, -42.54)
CIE-LCH	lch(68.65, 42.56, 268.32°)
OKLab	oklab(72.84% -0.0423 -0.1198)
OKLCH	oklch(72.84% 0.127 250.6)
XYZ	xyz(36.5553, 38.8582, 91.1444)
Luminance	0.3886 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ACF4 #F4AE66

analogous

#66F3F4 #66ACF4 #6766F4

triadic

#66ACF4 #F466AC #ACF466

tetradic

#66ACF4 #F466F3 #F4AE66 #66F467

square

#66ACF4 #F466F3 #F4AE66 #66F467

split-complementary

#66ACF4 #F46766 #F3F466

monochromatic

#0F6ED1 #2D8DF0 #66ACF4 #9FCBF8 #D8EAFC

Accessibility & contrast

On white

2.39

#66ACF4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.77

#66ACF4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ACF4

8.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ACF4	#FFFFFF	#000000	##000000
##66ACF4	1.00	2.39	8.77	8.77
#FFFFFF	2.39	1.00	21.00	21.00
#000000	8.77	21.00	1.00	1.00
##000000	8.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8EAFF7

Deuteranopia (green-blind)

#7BA1F3

Tritanopia (blue-blind)

#00BDC5

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #66acf4;
/* rgb */ color: rgb(102, 172, 244);
/* oklch */ color: oklch(72.8% 0.127 250.6);

Tailwind

colors: {
  custom: {
    50: '#9cc4f8',
    500: '#66acf4',
    950: '#000000',
  },
}

SCSS

$custom: #66acf4;
$custom-light: #9cc4f8;
$custom-dark: #000000;

JSON

{
  "hex": "#66acf4",
  "rgb": {
    "r": 102,
    "g": 172,
    "b": 244
  },
  "hsl": {
    "h": 210.423,
    "s": 86.585,
    "l": 67.843
  },
  "oklch": {
    "l": 0.72844,
    "c": 0.12709,
    "h": 250.6
  },
  "luminance": 0.38861
}

Semantic roles & 50–950 ramp

primary

#66ACF4

secondary

#F1DBC5

accent

#7402E3

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66ACF4

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

Preview Lab → · Contrast checker → · Palette generator →