#666AE4#666AE4

#666AE4 is a mid, vivid blue. Relative luminance 0.187; OKLCH L 58.5% C 0.181 H 277.8°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#666AE4
RGB	rgb(102, 106, 228)
HSL	hsl(238, 70%, 65%)
HSV	hsv(238, 55%, 89%)
CMYK	cmyk(55.3%, 53.5%, 0%, 10.6%)
CIE-LAB	lab(50.37, 32.69, -62.74)
CIE-LCH	lch(50.37, 70.75, 297.52°)
OKLab	oklab(58.51% 0.0246 -0.1796)
OKLCH	oklch(58.51% 0.181 277.8)
XYZ	xyz(24.6327, 18.7326, 75.7015)
Luminance	0.1873 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666AE4 #E4E066

analogous

#66A9E4 #666AE4 #A166E4

triadic

#666AE4 #E4666A #6AE466

tetradic

#666AE4 #E466A9 #E4E066 #66E4A1

square

#666AE4 #E466A9 #E4E066 #66E4A1

split-complementary

#666AE4 #E4A166 #A9E466

monochromatic

#1F24B0 #3237DB #666AE4 #9A9DED #CECFF6

Accessibility & contrast

On white

4.42

#666AE4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#666AE4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666AE4

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666AE4	#FFFFFF	#000000	##000000
##666AE4	1.00	4.42	4.75	4.75
#FFFFFF	4.42	1.00	21.00	21.00
#000000	4.75	21.00	1.00	1.00
##000000	4.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E7DE8

Deuteranopia (green-blind)

#0073E1

Tritanopia (blue-blind)

#23869D

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #666ae4;
/* rgb */ color: rgb(102, 106, 228);
/* oklch */ color: oklch(58.5% 0.181 277.8);

Tailwind

colors: {
  custom: {
    50: '#9b94ed',
    500: '#666ae4',
    950: '#000000',
  },
}

SCSS

$custom: #666ae4;
$custom-light: #9b94ed;
$custom-dark: #000000;

JSON

{
  "hex": "#666ae4",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 228
  },
  "hsl": {
    "h": 238.095,
    "s": 70,
    "l": 64.706
  },
  "oklch": {
    "l": 0.58513,
    "c": 0.18127,
    "h": 277.8
  },
  "luminance": 0.18734
}

Semantic roles & 50–950 ramp

primary

#666AE4

secondary

#E9E7BD

accent

#CC14D2

background

#FAF9FE

surface

#F4F1FD

border

#CECBD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666AE4

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

Preview Lab → · Contrast checker → · Palette generator →