#66C7EF#66C7EF

#66C7EF is a light, moderate cyan. Relative luminance 0.499; OKLCH L 78.6% C 0.107 H 227.5°. Best body text is #000000 at 10.98:1 contrast (WCAG AA passes).

Color values

HEX	#66C7EF
RGB	rgb(102, 199, 239)
HSL	hsl(198, 81%, 67%)
HSV	hsv(198, 57%, 94%)
CMYK	cmyk(57.3%, 16.7%, 0%, 6.3%)
CIE-LAB	lab(76.01, -17.33, -28.43)
CIE-LCH	lch(76.01, 33.30, 238.63°)
OKLab	oklab(78.6% -0.0726 -0.0792)
OKLCH	oklch(78.6% 0.107 227.5)
XYZ	xyz(41.4769, 49.8997, 89.0904)
Luminance	0.4990 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C7EF #EF8E66

analogous

#66EFD2 #66C7EF #6683EF

triadic

#66C7EF #EF66C7 #C7EF66

tetradic

#66C7EF #D266EF #EF8E66 #83EF66

square

#66C7EF #D266EF #EF8E66 #83EF66

split-complementary

#66C7EF #EF6683 #EFD266

monochromatic

#1592C6 #2FB3E9 #66C7EF #9DDBF5 #D5F0FB

Accessibility & contrast

On white

1.91

#66C7EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.98

#66C7EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C7EF

10.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C7EF	#FFFFFF	#000000	##000000
##66C7EF	1.00	1.91	10.98	10.98
#FFFFFF	1.91	1.00	21.00	21.00
#000000	10.98	21.00	1.00	1.00
##000000	10.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B2C4F1

Deuteranopia (green-blind)

#9EB5EF

Tritanopia (blue-blind)

#00D3D4

Achromatopsia (no color)

#BBBBBB

Design tokens & code

CSS

--color: #66c7ef;
/* rgb */ color: rgb(102, 199, 239);
/* oklch */ color: oklch(78.6% 0.107 227.5);

Tailwind

colors: {
  custom: {
    50: '#9cd8f4',
    500: '#66c7ef',
    950: '#000000',
  },
}

SCSS

$custom: #66c7ef;
$custom-light: #9cd8f4;
$custom-dark: #000000;

JSON

{
  "hex": "#66c7ef",
  "rgb": {
    "r": 102,
    "g": 199,
    "b": 239
  },
  "hsl": {
    "h": 197.518,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.78604,
    "c": 0.10745,
    "h": 227.5
  },
  "luminance": 0.49904
}

Semantic roles & 50–950 ramp

primary

#66C7EF

secondary

#EECFC2

accent

#4608DD

background

#FAFDFE

surface

#F4FAFD

border

#CED3D5

text

#0F1417

muted

#7F8385

Preview Lab

Preview with #66C7EF

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

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