#66AEE9#66AEE9

#66AEE9 is a light, moderate cyan. Relative luminance 0.390; OKLCH L 72.8% C 0.113 H 245.0°. Best body text is #000000 at 8.80:1 contrast (WCAG AA passes).

Color values

HEX	#66AEE9
RGB	rgb(102, 174, 233)
HSL	hsl(207, 75%, 66%)
HSV	hsv(207, 56%, 91%)
CMYK	cmyk(56.2%, 25.3%, 0%, 8.6%)
CIE-LAB	lab(68.73, -5.77, -36.41)
CIE-LCH	lch(68.73, 36.87, 261.00°)
OKLab	oklab(72.76% -0.0477 -0.1021)
OKLCH	oklch(72.76% 0.113 245)
XYZ	xyz(35.3182, 38.9770, 82.7371)
Luminance	0.3898 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66AEE9 #E9A166

analogous

#66E9E2 #66AEE9 #666CE9

triadic

#66AEE9 #E966AE #AEE966

tetradic

#66AEE9 #E266E9 #E9A166 #6CE966

square

#66AEE9 #E266E9 #E9A166 #6CE966

split-complementary

#66AEE9 #E9666C #E9E266

monochromatic

#1B72BA #3092E1 #66AEE9 #9CCAF1 #D1E7F8

Accessibility & contrast

On white

2.39

#66AEE9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.80

#66AEE9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66AEE9

8.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66AEE9	#FFFFFF	#000000	##000000
##66AEE9	1.00	2.39	8.80	8.80
#FFFFFF	2.39	1.00	21.00	21.00
#000000	8.80	21.00	1.00	1.00
##000000	8.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95AFEC

Deuteranopia (green-blind)

#83A2E8

Tritanopia (blue-blind)

#00BCC2

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #66aee9;
/* rgb */ color: rgb(102, 174, 233);
/* oklch */ color: oklch(72.8% 0.113 245.0);

Tailwind

colors: {
  custom: {
    50: '#9bc6f0',
    500: '#66aee9',
    950: '#000000',
  },
}

SCSS

$custom: #66aee9;
$custom-light: #9bc6f0;
$custom-dark: #000000;

JSON

{
  "hex": "#66aee9",
  "rgb": {
    "r": 102,
    "g": 174,
    "b": 233
  },
  "hsl": {
    "h": 207.023,
    "s": 74.857,
    "l": 65.686
  },
  "oklch": {
    "l": 0.72757,
    "c": 0.11271,
    "h": 245
  },
  "luminance": 0.3898
}

Semantic roles & 50–950 ramp

primary

#66AEE9

secondary

#EBD3C0

accent

#690ED7

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #66AEE9

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

Preview Lab → · Contrast checker → · Palette generator →