#66AFFB#66AFFB

#66AFFB is a light, vivid cyan. Relative luminance 0.405; OKLCH L 73.8% C 0.133 H 250.9°. Best body text is #000000 at 9.09:1 contrast (WCAG AA passes).

Color values

HEX	#66AFFB
RGB	rgb(102, 175, 251)
HSL	hsl(211, 95%, 69%)
HSV	hsv(211, 59%, 98%)
CMYK	cmyk(59.4%, 30.3%, 0%, 1.6%)
CIE-LAB	lab(69.79, -0.73, -44.56)
CIE-LCH	lch(69.79, 44.57, 269.06°)
OKLab	oklab(73.84% -0.0434 -0.1257)
OKLCH	oklch(73.84% 0.133 250.9)
XYZ	xyz(38.2157, 40.4463, 97.0411)
Luminance	0.4045 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66AFFB #FBB266

analogous

#66F9FB #66AFFB #6866FB

triadic

#66AFFB #FB66AF #AFFB66

tetradic

#66AFFB #FB66F9 #FBB266 #66FB68

square

#66AFFB #FB66F9 #FBB266 #66FB68

split-complementary

#66AFFB #FB6866 #F9FB66

monochromatic

#0671E1 #2A90F9 #66AFFB #A2CEFD #DDEDFE

Accessibility & contrast

On white

2.31

#66AFFB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.09

#66AFFB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66AFFB

9.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66AFFB	#FFFFFF	#000000	##000000
##66AFFB	1.00	2.31	9.09	9.09
#FFFFFF	2.31	1.00	21.00	21.00
#000000	9.09	21.00	1.00	1.00
##000000	9.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8FB3FE

Deuteranopia (green-blind)

#7BA4F9

Tritanopia (blue-blind)

#00C1CA

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #66affb;
/* rgb */ color: rgb(102, 175, 251);
/* oklch */ color: oklch(73.8% 0.133 250.9);

Tailwind

colors: {
  custom: {
    50: '#9dc6fd',
    500: '#66affb',
    950: '#000000',
  },
}

SCSS

$custom: #66affb;
$custom-light: #9dc6fd;
$custom-dark: #000000;

JSON

{
  "hex": "#66affb",
  "rgb": {
    "r": 102,
    "g": 175,
    "b": 251
  },
  "hsl": {
    "h": 210.604,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.73839,
    "c": 0.13299,
    "h": 250.9
  },
  "luminance": 0.4045
}

Semantic roles & 50–950 ramp

primary

#66AFFB

secondary

#F4DFC9

accent

#7500E6

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66AFFB

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

Preview Lab → · Contrast checker → · Palette generator →