#66C0EF#66C0EF

#66C0EF is a light, moderate cyan. Relative luminance 0.468; OKLCH L 77.0% C 0.109 H 233.4°. Best body text is #000000 at 10.35:1 contrast (WCAG AA passes).

Color values

HEX	#66C0EF
RGB	rgb(102, 192, 239)
HSL	hsl(201, 81%, 67%)
HSV	hsv(201, 57%, 94%)
CMYK	cmyk(57.3%, 19.7%, 0%, 6.3%)
CIE-LAB	lab(74.03, -13.67, -31.47)
CIE-LCH	lch(74.03, 34.31, 246.52°)
OKLab	oklab(77.03% -0.0652 -0.0878)
OKLCH	oklch(77.03% 0.109 233.4)
XYZ	xyz(39.9032, 46.7523, 88.5659)
Luminance	0.4676 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C0EF #EF9566

analogous

#66EFDA #66C0EF #667CEF

triadic

#66C0EF #EF66C0 #C0EF66

tetradic

#66C0EF #DA66EF #EF9566 #7CEF66

square

#66C0EF #DA66EF #EF9566 #7CEF66

split-complementary

#66C0EF #EF667C #EFDA66

monochromatic

#1589C6 #2FA9E9 #66C0EF #9DD7F5 #D5EEFB

Accessibility & contrast

On white

2.03

#66C0EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.35

#66C0EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C0EF

10.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C0EF	#FFFFFF	#000000	##000000
##66C0EF	1.00	2.03	10.35	10.35
#FFFFFF	2.03	1.00	21.00	21.00
#000000	10.35	21.00	1.00	1.00
##000000	10.35	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A9BEF1

Deuteranopia (green-blind)

#96B0EE

Tritanopia (blue-blind)

#00CDD0

Achromatopsia (no color)

#B6B6B6

Design tokens & code

CSS

--color: #66c0ef;
/* rgb */ color: rgb(102, 192, 239);
/* oklch */ color: oklch(77.0% 0.109 233.4);

Tailwind

colors: {
  custom: {
    50: '#9cd3f4',
    500: '#66c0ef',
    950: '#000000',
  },
}

SCSS

$custom: #66c0ef;
$custom-light: #9cd3f4;
$custom-dark: #000000;

JSON

{
  "hex": "#66c0ef",
  "rgb": {
    "r": 102,
    "g": 192,
    "b": 239
  },
  "hsl": {
    "h": 200.584,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.7703,
    "c": 0.10938,
    "h": 233.4
  },
  "luminance": 0.46756
}

Semantic roles & 50–950 ramp

primary

#66C0EF

secondary

#EED2C2

accent

#5108DD

background

#FAFCFE

surface

#F4F9FD

border

#CED2D5

text

#0F1417

muted

#7F8285

Preview Lab

Preview with #66C0EF

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

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