#666EC7#666EC7

#666EC7 is a mid, vivid blue. Relative luminance 0.181; OKLCH L 57.4% C 0.136 H 277.3°. Best body text is #000000 at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#666EC7
RGB	rgb(102, 110, 199)
HSL	hsl(235, 46%, 59%)
HSV	hsv(235, 49%, 78%)
CMYK	cmyk(48.7%, 44.7%, 0%, 22%)
CIE-LAB	lab(49.62, 21.17, -47.48)
CIE-LCH	lch(49.62, 51.98, 294.03°)
OKLab	oklab(57.37% 0.0174 -0.1347)
OKLCH	oklch(57.37% 0.136 277.3)
XYZ	xyz(21.3610, 18.0990, 56.3896)
Luminance	0.1810 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EC7 #C7BF66

analogous

#669FC7 #666EC7 #8F66C7

triadic

#666EC7 #C7666E #6EC766

tetradic

#666EC7 #C7669F #C7BF66 #66C78F

square

#666EC7 #C7669F #C7BF66 #66C78F

split-complementary

#666EC7 #C78F66 #9FC766

monochromatic

#303783 #4049B0 #666EC7 #9398D7 #C0C3E8

Accessibility & contrast

On white

4.55

#666EC7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.62

#666EC7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666EC7

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EC7	#FFFFFF	#000000	##000000
##666EC7	1.00	4.55	4.62	4.62
#FFFFFF	4.55	1.00	21.00	21.00
#000000	4.62	21.00	1.00	1.00
##000000	4.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#497ACA

Deuteranopia (green-blind)

#4172C5

Tritanopia (blue-blind)

#418191

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #666ec7;
/* rgb */ color: rgb(102, 110, 199);
/* oklch */ color: oklch(57.4% 0.136 277.3);

Tailwind

colors: {
  custom: {
    50: '#9797d8',
    500: '#666ec7',
    950: '#000000',
  },
}

SCSS

$custom: #666ec7;
$custom-light: #9797d8;
$custom-dark: #000000;

JSON

{
  "hex": "#666ec7",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 199
  },
  "hsl": {
    "h": 235.052,
    "s": 46.411,
    "l": 59.02
  },
  "oklch": {
    "l": 0.57374,
    "c": 0.13583,
    "h": 277.3
  },
  "luminance": 0.181
}

Semantic roles & 50–950 ramp

primary

#666EC7

secondary

#D7D4B1

accent

#CB52D6

background

#F9F9FD

surface

#F2F2FA

border

#CCCCD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #666EC7

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

Preview Lab → · Contrast checker → · Palette generator →