#66BBFF#66BBFF

#66BBFF is a light, vivid cyan. Relative luminance 0.456; OKLCH L 76.6% C 0.128 H 244.8°. Best body text is #000000 at 10.12:1 contrast (WCAG AA passes).

Color values

HEX	#66BBFF
RGB	rgb(102, 187, 255)
HSL	hsl(207, 100%, 70%)
HSV	hsv(207, 60%, 100%)
CMYK	cmyk(60%, 26.7%, 0%, 0%)
CIE-LAB	lab(73.27, -6.11, -41.27)
CIE-LCH	lch(73.27, 41.72, 261.58°)
OKLab	oklab(76.64% -0.0547 -0.116)
OKLCH	oklch(76.64% 0.128 244.8)
XYZ	xyz(41.2931, 45.5815, 101.2103)
Luminance	0.4558 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BBFF #FFAA66

analogous

#66FFF7 #66BBFF #666EFF

triadic

#66BBFF #FF66BB #BBFF66

tetradic

#66BBFF #F766FF #FFAA66 #6EFF66

square

#66BBFF #F766FF #FFAA66 #6EFF66

split-complementary

#66BBFF #FF666E #FFF766

monochromatic

#0082EB #29A0FF #66BBFF #A3D6FF #E0F1FF

Accessibility & contrast

On white

2.08

#66BBFF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.12

#66BBFF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BBFF

10.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BBFF	#FFFFFF	#000000	##000000
##66BBFF	1.00	2.08	10.12	10.12
#FFFFFF	2.08	1.00	21.00	21.00
#000000	10.12	21.00	1.00	1.00
##000000	10.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DBCFF

Deuteranopia (green-blind)

#89ADFE

Tritanopia (blue-blind)

#00CBD3

Achromatopsia (no color)

#B4B4B4

Design tokens & code

CSS

--color: #66bbff;
/* rgb */ color: rgb(102, 187, 255);
/* oklch */ color: oklch(76.6% 0.128 244.8);

Tailwind

colors: {
  custom: {
    50: '#9dcfff',
    500: '#66bbff',
    950: '#000000',
  },
}

SCSS

$custom: #66bbff;
$custom-light: #9dcfff;
$custom-dark: #000000;

JSON

{
  "hex": "#66bbff",
  "rgb": {
    "r": 102,
    "g": 187,
    "b": 255
  },
  "hsl": {
    "h": 206.667,
    "s": 100,
    "l": 70
  },
  "oklch": {
    "l": 0.76641,
    "c": 0.12831,
    "h": 244.8
  },
  "luminance": 0.45585
}

Semantic roles & 50–950 ramp

primary

#66BBFF

secondary

#F6DECB

accent

#6600E6

background

#FAFCFF

surface

#F4F9FF

border

#CED2D7

text

#0F1318

muted

#7F8286

Preview Lab

Preview with #66BBFF

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

Preview Lab → · Contrast checker → · Palette generator →