#66A3EE#66A3EE

#66A3EE is a light, vivid cyan. Relative luminance 0.352; OKLCH L 70.6% C 0.128 H 254.4°. Best body text is #000000 at 8.04:1 contrast (WCAG AA passes).

Color values

HEX	#66A3EE
RGB	rgb(102, 163, 238)
HSL	hsl(213, 80%, 67%)
HSV	hsv(213, 57%, 93%)
CMYK	cmyk(57.1%, 31.5%, 0%, 6.7%)
CIE-LAB	lab(65.90, 1.95, -43.58)
CIE-LCH	lch(65.90, 43.63, 272.56°)
OKLab	oklab(70.6% -0.0343 -0.1229)
OKLCH	oklch(70.6% 0.128 254.4)
XYZ	xyz(34.0038, 35.1893, 85.8726)
Luminance	0.3519 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66A3EE #EEB166

analogous

#66E7EE #66A3EE #6D66EE

triadic

#66A3EE #EE66A3 #A3EE66

tetradic

#66A3EE #EE66E7 #EEB166 #66EE6D

square

#66A3EE #EE66E7 #EEB166 #66EE6D

split-complementary

#66A3EE #EE6D66 #E7EE66

monochromatic

#1664C4 #2F82E8 #66A3EE #9DC4F4 #D4E5FA

Accessibility & contrast

On white

2.61

#66A3EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.04

#66A3EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66A3EE

8.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66A3EE	#FFFFFF	#000000	##000000
##66A3EE	1.00	2.61	8.04	8.04
#FFFFFF	2.61	1.00	21.00	21.00
#000000	8.04	21.00	1.00	1.00
##000000	8.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#84A7F1

Deuteranopia (green-blind)

#729AEC

Tritanopia (blue-blind)

#00B4BE

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #66a3ee;
/* rgb */ color: rgb(102, 163, 238);
/* oklch */ color: oklch(70.6% 0.128 254.4);

Tailwind

colors: {
  custom: {
    50: '#9bbef4',
    500: '#66a3ee',
    950: '#000000',
  },
}

SCSS

$custom: #66a3ee;
$custom-light: #9bbef4;
$custom-dark: #000000;

JSON

{
  "hex": "#66a3ee",
  "rgb": {
    "r": 102,
    "g": 163,
    "b": 238
  },
  "hsl": {
    "h": 213.088,
    "s": 80,
    "l": 66.667
  },
  "oklch": {
    "l": 0.70597,
    "c": 0.12763,
    "h": 254.4
  },
  "luminance": 0.35192
}

Semantic roles & 50–950 ramp

primary

#66A3EE

secondary

#EEDAC2

accent

#7E09DC

background

#FAFBFE

surface

#F3F6FD

border

#CDD0D5

text

#0F1217

muted

#7F8185

Preview Lab

Preview with #66A3EE

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

Preview Lab → · Contrast checker → · Palette generator →