#66C4E4#66C4E4

#66C4E4 is a light, moderate cyan. Relative luminance 0.479; OKLCH L 77.5% C 0.100 H 222.7°. Best body text is #000000 at 10.58:1 contrast (WCAG AA passes).

Color values

HEX	#66C4E4
RGB	rgb(102, 196, 228)
HSL	hsl(195, 70%, 65%)
HSV	hsv(195, 55%, 89%)
CMYK	cmyk(55.3%, 14%, 0%, 10.6%)
CIE-LAB	lab(74.76, -18.99, -24.40)
CIE-LCH	lch(74.76, 30.92, 232.12°)
OKLab	oklab(77.48% -0.0734 -0.0678)
OKLCH	oklch(77.48% 0.1 222.7)
XYZ	xyz(39.2176, 47.9025, 80.5631)
Luminance	0.4791 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C4E4 #E48666

analogous

#66E4C5 #66C4E4 #6685E4

triadic

#66C4E4 #E466C4 #C4E466

tetradic

#66C4E4 #C566E4 #E48666 #85E466

square

#66C4E4 #C566E4 #E48666 #85E466

split-complementary

#66C4E4 #E46685 #E4C566

monochromatic

#1F8CB0 #32B0DB #66C4E4 #9AD8ED #CEECF6

Accessibility & contrast

On white

1.98

#66C4E4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.58

#66C4E4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C4E4

10.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C4E4	#FFFFFF	#000000	##000000
##66C4E4	1.00	1.98	10.58	10.58
#FFFFFF	1.98	1.00	21.00	21.00
#000000	10.58	21.00	1.00	1.00
##000000	10.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B1C0E6

Deuteranopia (green-blind)

#9FB2E4

Tritanopia (blue-blind)

#00CECE

Achromatopsia (no color)

#B8B8B8

Design tokens & code

CSS

--color: #66c4e4;
/* rgb */ color: rgb(102, 196, 228);
/* oklch */ color: oklch(77.5% 0.100 222.7);

Tailwind

colors: {
  custom: {
    50: '#9bd6ec',
    500: '#66c4e4',
    950: '#000000',
  },
}

SCSS

$custom: #66c4e4;
$custom-light: #9bd6ec;
$custom-dark: #000000;

JSON

{
  "hex": "#66c4e4",
  "rgb": {
    "r": 102,
    "g": 196,
    "b": 228
  },
  "hsl": {
    "h": 195.238,
    "s": 70,
    "l": 64.706
  },
  "oklch": {
    "l": 0.77481,
    "c": 0.09992,
    "h": 222.7
  },
  "luminance": 0.47906
}

Semantic roles & 50–950 ramp

primary

#66C4E4

secondary

#E9C8BD

accent

#4414D2

background

#FAFDFE

surface

#F3FAFD

border

#CDD3D5

text

#0F1416

muted

#7F8384

Preview Lab

Preview with #66C4E4

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

Preview Lab → · Contrast checker → · Palette generator →