#66CBF3#66CBF3

#66CBF3 is a light, moderate cyan. Relative luminance 0.520; OKLCH L 79.7% C 0.110 H 226.6°. Best body text is #000000 at 11.40:1 contrast (WCAG AA passes).

Color values

HEX	#66CBF3
RGB	rgb(102, 203, 243)
HSL	hsl(197, 85%, 68%)
HSV	hsv(197, 58%, 95%)
CMYK	cmyk(58%, 16.5%, 0%, 4.7%)
CIE-LAB	lab(77.28, -18.22, -28.62)
CIE-LCH	lch(77.28, 33.93, 237.51°)
OKLab	oklab(79.67% -0.0754 -0.0797)
OKLCH	oklch(79.67% 0.11 226.6)
XYZ	xyz(43.0068, 52.0036, 92.5479)
Luminance	0.5201 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CBF3 #F38E66

analogous

#66F3D4 #66CBF3 #6685F3

triadic

#66CBF3 #F366CB #CBF366

tetradic

#66CBF3 #D466F3 #F38E66 #85F366

square

#66CBF3 #D466F3 #F38E66 #85F366

split-complementary

#66CBF3 #F36685 #F3D466

monochromatic

#1098CE #2DB8EF #66CBF3 #9FDEF7 #D7F2FC

Accessibility & contrast

On white

1.84

#66CBF3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.40

#66CBF3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CBF3

11.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CBF3	#FFFFFF	#000000	##000000
##66CBF3	1.00	1.84	11.40	11.40
#FFFFFF	1.84	1.00	21.00	21.00
#000000	11.40	21.00	1.00	1.00
##000000	11.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B6C7F5

Deuteranopia (green-blind)

#A1B8F3

Tritanopia (blue-blind)

#00D7D8

Achromatopsia (no color)

#BFBFBF

Design tokens & code

CSS

--color: #66cbf3;
/* rgb */ color: rgb(102, 203, 243);
/* oklch */ color: oklch(79.7% 0.110 226.6);

Tailwind

colors: {
  custom: {
    50: '#9ddbf7',
    500: '#66cbf3',
    950: '#000000',
  },
}

SCSS

$custom: #66cbf3;
$custom-light: #9ddbf7;
$custom-dark: #000000;

JSON

{
  "hex": "#66cbf3",
  "rgb": {
    "r": 102,
    "g": 203,
    "b": 243
  },
  "hsl": {
    "h": 197.021,
    "s": 85.455,
    "l": 67.647
  },
  "oklch": {
    "l": 0.79669,
    "c": 0.10974,
    "h": 226.6
  },
  "luminance": 0.52008
}

Semantic roles & 50–950 ramp

primary

#66CBF3

secondary

#CA5E33

accent

#4304E2

background

#FCFEFF

surface

#F6FBFE

border

#D0D4D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #66CBF3

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

Preview Lab → · Contrast checker → · Palette generator →