#66A3EF#66A3EF

#66A3EF is a light, vivid cyan. Relative luminance 0.353; OKLCH L 70.6% C 0.129 H 254.7°. Best body text is #000000 at 8.05:1 contrast (WCAG AA passes).

Color values

HEX	#66A3EF
RGB	rgb(102, 163, 239)
HSL	hsl(213, 81%, 67%)
HSV	hsv(213, 57%, 94%)
CMYK	cmyk(57.3%, 31.8%, 0%, 6.3%)
CIE-LAB	lab(65.94, 2.27, -44.06)
CIE-LCH	lch(65.94, 44.12, 272.94°)
OKLab	oklab(70.65% -0.0341 -0.1243)
OKLCH	oklch(70.65% 0.129 254.7)
XYZ	xyz(34.1511, 35.2482, 86.6485)
Luminance	0.3525 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66A3EF #EFB266

analogous

#66E7EF #66A3EF #6E66EF

triadic

#66A3EF #EF66A3 #A3EF66

tetradic

#66A3EF #EF66E7 #EFB266 #66EF6E

square

#66A3EF #EF66E7 #EFB266 #66EF6E

split-complementary

#66A3EF #EF6E66 #E7EF66

monochromatic

#1564C6 #2F82E9 #66A3EF #9DC4F5 #D5E6FB

Accessibility & contrast

On white

2.61

#66A3EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.05

#66A3EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66A3EF

8.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66A3EF	#FFFFFF	#000000	##000000
##66A3EF	1.00	2.61	8.05	8.05
#FFFFFF	2.61	1.00	21.00	21.00
#000000	8.05	21.00	1.00	1.00
##000000	8.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#84A7F2

Deuteranopia (green-blind)

#729AED

Tritanopia (blue-blind)

#00B4BE

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #66a3ef;
/* rgb */ color: rgb(102, 163, 239);
/* oklch */ color: oklch(70.6% 0.129 254.7);

Tailwind

colors: {
  custom: {
    50: '#9bbdf4',
    500: '#66a3ef',
    950: '#000000',
  },
}

SCSS

$custom: #66a3ef;
$custom-light: #9bbdf4;
$custom-dark: #000000;

JSON

{
  "hex": "#66a3ef",
  "rgb": {
    "r": 102,
    "g": 163,
    "b": 239
  },
  "hsl": {
    "h": 213.285,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.70648,
    "c": 0.1289,
    "h": 254.7
  },
  "luminance": 0.35251
}

Semantic roles & 50–950 ramp

primary

#66A3EF

secondary

#EEDBC2

accent

#7E08DD

background

#FAFBFE

surface

#F4F6FD

border

#CED0D5

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66A3EF

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

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