#66ACFB#66ACFB

#66ACFB is a light, vivid cyan. Relative luminance 0.393; OKLCH L 73.2% C 0.136 H 252.7°. Best body text is #000000 at 8.86:1 contrast (WCAG AA passes).

Color values

HEX	#66ACFB
RGB	rgb(102, 172, 251)
HSL	hsl(212, 95%, 69%)
HSV	hsv(212, 59%, 98%)
CMYK	cmyk(59.4%, 31.5%, 0%, 1.6%)
CIE-LAB	lab(68.96, 0.96, -45.86)
CIE-LCH	lch(68.96, 45.87, 271.19°)
OKLab	oklab(73.19% -0.0403 -0.1295)
OKLCH	oklch(73.19% 0.136 252.7)
XYZ	xyz(37.6383, 39.2914, 96.8486)
Luminance	0.3930 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ACFB #FBB566

analogous

#66F6FB #66ACFB #6B66FB

triadic

#66ACFB #FB66AC #ACFB66

tetradic

#66ACFB #FB66F6 #FBB566 #66FB6B

square

#66ACFB #FB66F6 #FBB566 #66FB6B

split-complementary

#66ACFB #FB6B66 #F6FB66

monochromatic

#066DE1 #2A8CF9 #66ACFB #A2CCFD #DDEDFE

Accessibility & contrast

On white

2.37

#66ACFB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.86

#66ACFB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ACFB

8.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ACFB	#FFFFFF	#000000	##000000
##66ACFB	1.00	2.37	8.86	8.86
#FFFFFF	2.37	1.00	21.00	21.00
#000000	8.86	21.00	1.00	1.00
##000000	8.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8BB0FE

Deuteranopia (green-blind)

#77A2F9

Tritanopia (blue-blind)

#00BEC8

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #66acfb;
/* rgb */ color: rgb(102, 172, 251);
/* oklch */ color: oklch(73.2% 0.136 252.7);

Tailwind

colors: {
  custom: {
    50: '#9dc4fd',
    500: '#66acfb',
    950: '#000000',
  },
}

SCSS

$custom: #66acfb;
$custom-light: #9dc4fd;
$custom-dark: #000000;

JSON

{
  "hex": "#66acfb",
  "rgb": {
    "r": 102,
    "g": 172,
    "b": 251
  },
  "hsl": {
    "h": 211.812,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.73192,
    "c": 0.13561,
    "h": 252.7
  },
  "luminance": 0.39295
}

Semantic roles & 50–950 ramp

primary

#66ACFB

secondary

#F4E0C9

accent

#7A00E6

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66ACFB

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

Preview Lab → · Contrast checker → · Palette generator →