#66ACEE#66ACEE

#66ACEE is a light, moderate cyan. Relative luminance 0.385; OKLCH L 72.6% C 0.120 H 248.5°. Best body text is #000000 at 8.70:1 contrast (WCAG AA passes).

Color values

HEX	#66ACEE
RGB	rgb(102, 172, 238)
HSL	hsl(209, 80%, 67%)
HSV	hsv(209, 57%, 93%)
CMYK	cmyk(57.1%, 27.7%, 0%, 6.7%)
CIE-LAB	lab(68.39, -3.12, -39.68)
CIE-LCH	lch(68.39, 39.80, 265.50°)
OKLab	oklab(72.55% -0.044 -0.1116)
OKLCH	oklch(72.55% 0.12 248.5)
XYZ	xyz(35.6590, 38.4997, 86.4244)
Luminance	0.3850 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66ACEE #EEA866

analogous

#66EEEC #66ACEE #6668EE

triadic

#66ACEE #EE66AC #ACEE66

tetradic

#66ACEE #EC66EE #EEA866 #68EE66

square

#66ACEE #EC66EE #EEA866 #68EE66

split-complementary

#66ACEE #EE6668 #EEEC66

monochromatic

#166FC4 #2F8EE8 #66ACEE #9DCAF4 #D4E8FA

Accessibility & contrast

On white

2.41

#66ACEE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.70

#66ACEE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ACEE

8.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66ACEE	#FFFFFF	#000000	##000000
##66ACEE	1.00	2.41	8.70	8.70
#FFFFFF	2.41	1.00	21.00	21.00
#000000	8.70	21.00	1.00	1.00
##000000	8.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#90AEF1

Deuteranopia (green-blind)

#7EA1ED

Tritanopia (blue-blind)

#00BBC3

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #66acee;
/* rgb */ color: rgb(102, 172, 238);
/* oklch */ color: oklch(72.6% 0.120 248.5);

Tailwind

colors: {
  custom: {
    50: '#9bc4f4',
    500: '#66acee',
    950: '#000000',
  },
}

SCSS

$custom: #66acee;
$custom-light: #9bc4f4;
$custom-dark: #000000;

JSON

{
  "hex": "#66acee",
  "rgb": {
    "r": 102,
    "g": 172,
    "b": 238
  },
  "hsl": {
    "h": 209.118,
    "s": 80,
    "l": 66.667
  },
  "oklch": {
    "l": 0.72552,
    "c": 0.11993,
    "h": 248.5
  },
  "luminance": 0.38503
}

Semantic roles & 50–950 ramp

primary

#66ACEE

secondary

#EED7C2

accent

#7009DC

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66ACEE

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

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