#66C4E7#66C4E7

#66C4E7 is a light, moderate cyan. Relative luminance 0.481; OKLCH L 77.6% C 0.102 H 224.8°. Best body text is #000000 at 10.61:1 contrast (WCAG AA passes).

Color values

HEX	#66C4E7
RGB	rgb(102, 196, 231)
HSL	hsl(196, 73%, 65%)
HSV	hsv(196, 56%, 91%)
CMYK	cmyk(55.8%, 15.2%, 0%, 9.4%)
CIE-LAB	lab(74.87, -18.12, -25.86)
CIE-LCH	lch(74.87, 31.58, 234.99°)
OKLab	oklab(77.6% -0.0723 -0.0719)
OKLCH	oklch(77.6% 0.102 224.8)
XYZ	xyz(39.6377, 48.0705, 82.7755)
Luminance	0.4807 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C4E7 #E78966

analogous

#66E7C9 #66C4E7 #6683E7

triadic

#66C4E7 #E766C4 #C4E766

tetradic

#66C4E7 #C966E7 #E78966 #83E766

square

#66C4E7 #C966E7 #E78966 #83E766

split-complementary

#66C4E7 #E76683 #E7C966

monochromatic

#1D8CB6 #31B0DF #66C4E7 #9BD8EF #D0EDF8

Accessibility & contrast

On white

1.98

#66C4E7 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.61

#66C4E7 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C4E7

10.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C4E7	#FFFFFF	#000000	##000000
##66C4E7	1.00	1.98	10.61	10.61
#FFFFFF	1.98	1.00	21.00	21.00
#000000	10.61	21.00	1.00	1.00
##000000	10.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B1C0E9

Deuteranopia (green-blind)

#9EB2E7

Tritanopia (blue-blind)

#00CFCF

Achromatopsia (no color)

#B8B8B8

Design tokens & code

CSS

--color: #66c4e7;
/* rgb */ color: rgb(102, 196, 231);
/* oklch */ color: oklch(77.6% 0.102 224.8);

Tailwind

colors: {
  custom: {
    50: '#9bd6ee',
    500: '#66c4e7',
    950: '#000000',
  },
}

SCSS

$custom: #66c4e7;
$custom-light: #9bd6ee;
$custom-dark: #000000;

JSON

{
  "hex": "#66c4e7",
  "rgb": {
    "r": 102,
    "g": 196,
    "b": 231
  },
  "hsl": {
    "h": 196.279,
    "s": 72.881,
    "l": 65.294
  },
  "oklch": {
    "l": 0.776,
    "c": 0.10197,
    "h": 224.8
  },
  "luminance": 0.48074
}

Semantic roles & 50–950 ramp

primary

#66C4E7

secondary

#EACABF

accent

#4611D5

background

#FAFDFE

surface

#F4FAFD

border

#CED3D5

text

#0F1416

muted

#7F8384

Preview Lab

Preview with #66C4E7

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

Preview Lab → · Contrast checker → · Palette generator →