#66CCF3#66CCF3

#66CCF3 is a light, moderate cyan. Relative luminance 0.525; OKLCH L 79.9% C 0.110 H 225.7°. Best body text is #000000 at 11.50:1 contrast (WCAG AA passes).

Color values

HEX	#66CCF3
RGB	rgb(102, 204, 243)
HSL	hsl(197, 85%, 68%)
HSV	hsv(197, 58%, 95%)
CMYK	cmyk(58%, 16%, 0%, 4.7%)
CIE-LAB	lab(77.57, -18.74, -28.19)
CIE-LCH	lch(77.57, 33.85, 236.38°)
OKLab	oklab(79.89% -0.0765 -0.0785)
OKLCH	oklch(79.89% 0.11 225.7)
XYZ	xyz(43.2437, 52.4774, 92.6269)
Luminance	0.5248 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CCF3 #F38D66

analogous

#66F3D4 #66CCF3 #6685F3

triadic

#66CCF3 #F366CC #CCF366

tetradic

#66CCF3 #D466F3 #F38D66 #85F366

square

#66CCF3 #D466F3 #F38D66 #85F366

split-complementary

#66CCF3 #F36685 #F3D466

monochromatic

#109ACE #2DB9EF #66CCF3 #9FDFF7 #D7F2FC

Accessibility & contrast

On white

1.83

#66CCF3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.50

#66CCF3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CCF3

11.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CCF3	#FFFFFF	#000000	##000000
##66CCF3	1.00	1.83	11.50	11.50
#FFFFFF	1.83	1.00	21.00	21.00
#000000	11.50	21.00	1.00	1.00
##000000	11.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B7C8F5

Deuteranopia (green-blind)

#A3B9F3

Tritanopia (blue-blind)

#00D8D9

Achromatopsia (no color)

#C0C0C0

Design tokens & code

CSS

--color: #66ccf3;
/* rgb */ color: rgb(102, 204, 243);
/* oklch */ color: oklch(79.9% 0.110 225.7);

Tailwind

colors: {
  custom: {
    50: '#9ddbf7',
    500: '#66ccf3',
    950: '#000000',
  },
}

SCSS

$custom: #66ccf3;
$custom-light: #9ddbf7;
$custom-dark: #000000;

JSON

{
  "hex": "#66ccf3",
  "rgb": {
    "r": 102,
    "g": 204,
    "b": 243
  },
  "hsl": {
    "h": 196.596,
    "s": 85.455,
    "l": 67.647
  },
  "oklch": {
    "l": 0.79894,
    "c": 0.10958,
    "h": 225.7
  },
  "luminance": 0.52482
}

Semantic roles & 50–950 ramp

primary

#66CCF3

secondary

#CA5D33

accent

#4104E2

background

#FCFEFF

surface

#F6FBFE

border

#D0D4D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #66CCF3

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

Preview Lab → · Contrast checker → · Palette generator →