#66ACF1#66ACF1

#66ACF1 is a light, vivid cyan. Relative luminance 0.387; OKLCH L 72.7% C 0.123 H 249.6°. Best body text is #000000 at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#66ACF1
RGB	rgb(102, 172, 241)
HSL	hsl(210, 83%, 67%)
HSV	hsv(210, 58%, 95%)
CMYK	cmyk(57.7%, 28.6%, 0%, 5.5%)
CIE-LAB	lab(68.52, -2.19, -41.12)
CIE-LCH	lch(68.52, 41.17, 266.95°)
OKLab	oklab(72.7% -0.0431 -0.1157)
OKLCH	oklch(72.7% 0.123 249.6)
XYZ	xyz(36.1035, 38.6775, 88.7649)
Luminance	0.3868 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ACF1 #F1AB66

analogous

#66F1F1 #66ACF1 #6667F1

triadic

#66ACF1 #F166AC #ACF166

tetradic

#66ACF1 #F166F1 #F1AB66 #67F166

square

#66ACF1 #F166F1 #F1AB66 #67F166

split-complementary

#66ACF1 #F16667 #F1F166

monochromatic

#126FCA #2E8EEC #66ACF1 #9ECAF6 #D6E9FB

Accessibility & contrast

On white

2.40

#66ACF1 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.74

#66ACF1 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ACF1

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ACF1	#FFFFFF	#000000	##000000
##66ACF1	1.00	2.40	8.74	8.74
#FFFFFF	2.40	1.00	21.00	21.00
#000000	8.74	21.00	1.00	1.00
##000000	8.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8FAFF4

Deuteranopia (green-blind)

#7DA1F0

Tritanopia (blue-blind)

#00BCC4

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #66acf1;
/* rgb */ color: rgb(102, 172, 241);
/* oklch */ color: oklch(72.7% 0.123 249.6);

Tailwind

colors: {
  custom: {
    50: '#9cc4f6',
    500: '#66acf1',
    950: '#000000',
  },
}

SCSS

$custom: #66acf1;
$custom-light: #9cc4f6;
$custom-dark: #000000;

JSON

{
  "hex": "#66acf1",
  "rgb": {
    "r": 102,
    "g": 172,
    "b": 241
  },
  "hsl": {
    "h": 209.784,
    "s": 83.234,
    "l": 67.255
  },
  "oklch": {
    "l": 0.72697,
    "c": 0.12349,
    "h": 249.6
  },
  "luminance": 0.38681
}

Semantic roles & 50–950 ramp

primary

#66ACF1

secondary

#EFD9C3

accent

#7206E0

background

#FAFCFF

surface

#F4F8FE

border

#CED1D6

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66ACF1

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

Preview Lab → · Contrast checker → · Palette generator →