#66ACF0#66ACF0

#66ACF0 is a light, vivid cyan. Relative luminance 0.386; OKLCH L 72.6% C 0.122 H 249.2°. Best body text is #000000 at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#66ACF0
RGB	rgb(102, 172, 240)
HSL	hsl(210, 82%, 67%)
HSV	hsv(210, 58%, 94%)
CMYK	cmyk(57.5%, 28.3%, 0%, 5.9%)
CIE-LAB	lab(68.47, -2.50, -40.64)
CIE-LCH	lch(68.47, 40.72, 266.48°)
OKLab	oklab(72.65% -0.0434 -0.1143)
OKLCH	oklch(72.65% 0.122 249.2)
XYZ	xyz(35.9545, 38.6179, 87.9804)
Luminance	0.3862 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ACF0 #F0AA66

analogous

#66F0EF #66ACF0 #6667F0

triadic

#66ACF0 #F066AC #ACF066

tetradic

#66ACF0 #EF66F0 #F0AA66 #67F066

square

#66ACF0 #EF66F0 #F0AA66 #67F066

split-complementary

#66ACF0 #F06667 #F0EF66

monochromatic

#146FC8 #2E8EEB #66ACF0 #9ECAF5 #D5E8FB

Accessibility & contrast

On white

2.41

#66ACF0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.72

#66ACF0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ACF0

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ACF0	#FFFFFF	#000000	##000000
##66ACF0	1.00	2.41	8.72	8.72
#FFFFFF	2.41	1.00	21.00	21.00
#000000	8.72	21.00	1.00	1.00
##000000	8.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8FAFF3

Deuteranopia (green-blind)

#7DA1EF

Tritanopia (blue-blind)

#00BCC4

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #66acf0;
/* rgb */ color: rgb(102, 172, 240);
/* oklch */ color: oklch(72.6% 0.122 249.2);

Tailwind

colors: {
  custom: {
    50: '#9bc4f5',
    500: '#66acf0',
    950: '#000000',
  },
}

SCSS

$custom: #66acf0;
$custom-light: #9bc4f5;
$custom-dark: #000000;

JSON

{
  "hex": "#66acf0",
  "rgb": {
    "r": 102,
    "g": 172,
    "b": 240
  },
  "hsl": {
    "h": 209.565,
    "s": 82.143,
    "l": 67.059
  },
  "oklch": {
    "l": 0.72649,
    "c": 0.1223,
    "h": 249.2
  },
  "luminance": 0.38621
}

Semantic roles & 50–950 ramp

primary

#66ACF0

secondary

#EFD9C3

accent

#7107DF

background

#FAFCFE

surface

#F4F8FD

border

#CED1D5

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66ACF0

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

Preview Lab → · Contrast checker → · Palette generator →