#66BBE4#66BBE4

#66BBE4 is a light, moderate cyan. Relative luminance 0.440; OKLCH L 75.4% C 0.101 H 231.1°. Best body text is #000000 at 9.79:1 contrast (WCAG AA passes).

Color values

HEX	#66BBE4
RGB	rgb(102, 187, 228)
HSL	hsl(200, 70%, 65%)
HSV	hsv(200, 55%, 89%)
CMYK	cmyk(55.3%, 18%, 0%, 10.6%)
CIE-LAB	lab(72.20, -14.29, -28.32)
CIE-LCH	lch(72.20, 31.73, 243.22°)
OKLab	oklab(75.44% -0.0636 -0.0789)
OKLCH	oklch(75.44% 0.101 231.1)
XYZ	xyz(37.2481, 43.9635, 79.9066)
Luminance	0.4397 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BBE4 #E48F66

analogous

#66E4CE #66BBE4 #667CE4

triadic

#66BBE4 #E466BB #BBE466

tetradic

#66BBE4 #CE66E4 #E48F66 #7CE466

square

#66BBE4 #CE66E4 #E48F66 #7CE466

split-complementary

#66BBE4 #E4667C #E4CE66

monochromatic

#1F81B0 #32A4DB #66BBE4 #9AD2ED #CEE9F6

Accessibility & contrast

On white

2.14

#66BBE4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.79

#66BBE4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BBE4

9.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BBE4	#FFFFFF	#000000	##000000
##66BBE4	1.00	2.14	9.79	9.79
#FFFFFF	2.14	1.00	21.00	21.00
#000000	9.79	21.00	1.00	1.00
##000000	9.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A7B9E6

Deuteranopia (green-blind)

#95ABE3

Tritanopia (blue-blind)

#00C6C8

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #66bbe4;
/* rgb */ color: rgb(102, 187, 228);
/* oklch */ color: oklch(75.4% 0.101 231.1);

Tailwind

colors: {
  custom: {
    50: '#9bcfec',
    500: '#66bbe4',
    950: '#000000',
  },
}

SCSS

$custom: #66bbe4;
$custom-light: #9bcfec;
$custom-dark: #000000;

JSON

{
  "hex": "#66bbe4",
  "rgb": {
    "r": 102,
    "g": 187,
    "b": 228
  },
  "hsl": {
    "h": 199.524,
    "s": 70,
    "l": 64.706
  },
  "oklch": {
    "l": 0.75441,
    "c": 0.10134,
    "h": 231.1
  },
  "luminance": 0.43967
}

Semantic roles & 50–950 ramp

primary

#66BBE4

secondary

#E9CBBD

accent

#5114D2

background

#FAFCFE

surface

#F3F9FD

border

#CDD2D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #66BBE4

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

Preview Lab → · Contrast checker → · Palette generator →