#66AAFB#66AAFB

#66AAFB is a light, vivid cyan. Relative luminance 0.385; OKLCH L 72.8% C 0.137 H 253.8°. Best body text is #000000 at 8.71:1 contrast (WCAG AA passes).

Color values

HEX	#66AAFB
RGB	rgb(102, 170, 251)
HSL	hsl(213, 95%, 69%)
HSV	hsv(213, 59%, 98%)
CMYK	cmyk(59.4%, 32.3%, 0%, 1.6%)
CIE-LAB	lab(68.41, 2.09, -46.72)
CIE-LCH	lch(68.41, 46.76, 272.56°)
OKLab	oklab(72.76% -0.0382 -0.132)
OKLCH	oklch(72.76% 0.137 253.8)
XYZ	xyz(37.2606, 38.5359, 96.7227)
Luminance	0.3854 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66AAFB #FBB766

analogous

#66F5FB #66AAFB #6D66FB

triadic

#66AAFB #FB66AA #AAFB66

tetradic

#66AAFB #FB66F5 #FBB766 #66FB6D

square

#66AAFB #FB66F5 #FBB766 #66FB6D

split-complementary

#66AAFB #FB6D66 #F5FB66

monochromatic

#066AE1 #2A89F9 #66AAFB #A2CBFD #DDECFE

Accessibility & contrast

On white

2.41

#66AAFB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.71

#66AAFB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66AAFB

8.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66AAFB	#FFFFFF	#000000	##000000
##66AAFB	1.00	2.41	8.71	8.71
#FFFFFF	2.41	1.00	21.00	21.00
#000000	8.71	21.00	1.00	1.00
##000000	8.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#88AFFE

Deuteranopia (green-blind)

#74A0F9

Tritanopia (blue-blind)

#00BDC7

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #66aafb;
/* rgb */ color: rgb(102, 170, 251);
/* oklch */ color: oklch(72.8% 0.137 253.8);

Tailwind

colors: {
  custom: {
    50: '#9dc3fd',
    500: '#66aafb',
    950: '#000000',
  },
}

SCSS

$custom: #66aafb;
$custom-light: #9dc3fd;
$custom-dark: #000000;

JSON

{
  "hex": "#66aafb",
  "rgb": {
    "r": 102,
    "g": 170,
    "b": 251
  },
  "hsl": {
    "h": 212.617,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.72763,
    "c": 0.13742,
    "h": 253.8
  },
  "luminance": 0.38539
}

Semantic roles & 50–950 ramp

primary

#66AAFB

secondary

#F4E0C9

accent

#7D00E6

background

#FAFBFF

surface

#F4F7FF

border

#CED0D7

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66AAFB

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

Preview Lab → · Contrast checker → · Palette generator →