#66C6EF#66C6EF

#66C6EF is a light, moderate cyan. Relative luminance 0.494; OKLCH L 78.4% C 0.108 H 228.3°. Best body text is #000000 at 10.89:1 contrast (WCAG AA passes).

Color values

HEX	#66C6EF
RGB	rgb(102, 198, 239)
HSL	hsl(198, 81%, 67%)
HSV	hsv(198, 57%, 94%)
CMYK	cmyk(57.3%, 17.2%, 0%, 6.3%)
CIE-LAB	lab(75.72, -16.82, -28.86)
CIE-LCH	lch(75.72, 33.40, 239.77°)
OKLab	oklab(78.38% -0.0716 -0.0804)
OKLCH	oklch(78.38% 0.108 228.3)
XYZ	xyz(41.2476, 49.4411, 89.0140)
Luminance	0.4945 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C6EF #EF8F66

analogous

#66EFD3 #66C6EF #6682EF

triadic

#66C6EF #EF66C6 #C6EF66

tetradic

#66C6EF #D366EF #EF8F66 #82EF66

square

#66C6EF #D366EF #EF8F66 #82EF66

split-complementary

#66C6EF #EF6682 #EFD366

monochromatic

#1591C6 #2FB1E9 #66C6EF #9DDBF5 #D5EFFB

Accessibility & contrast

On white

1.93

#66C6EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.89

#66C6EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C6EF

10.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C6EF	#FFFFFF	#000000	##000000
##66C6EF	1.00	1.93	10.89	10.89
#FFFFFF	1.93	1.00	21.00	21.00
#000000	10.89	21.00	1.00	1.00
##000000	10.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B1C3F1

Deuteranopia (green-blind)

#9DB4EE

Tritanopia (blue-blind)

#00D2D3

Achromatopsia (no color)

#BBBBBB

Design tokens & code

CSS

--color: #66c6ef;
/* rgb */ color: rgb(102, 198, 239);
/* oklch */ color: oklch(78.4% 0.108 228.3);

Tailwind

colors: {
  custom: {
    50: '#9cd7f4',
    500: '#66c6ef',
    950: '#000000',
  },
}

SCSS

$custom: #66c6ef;
$custom-light: #9cd7f4;
$custom-dark: #000000;

JSON

{
  "hex": "#66c6ef",
  "rgb": {
    "r": 102,
    "g": 198,
    "b": 239
  },
  "hsl": {
    "h": 197.956,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.78378,
    "c": 0.10765,
    "h": 228.3
  },
  "luminance": 0.49445
}

Semantic roles & 50–950 ramp

primary

#66C6EF

secondary

#EED0C2

accent

#4808DD

background

#FAFDFE

surface

#F4FAFD

border

#CED3D5

text

#0F1417

muted

#7F8385

Preview Lab

Preview with #66C6EF

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

Preview Lab → · Contrast checker → · Palette generator →