#666DC7#666DC7

#666DC7 is a mid, vivid blue. Relative luminance 0.179; OKLCH L 57.2% C 0.137 H 277.8°. Best body text is #FFFFFF at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#666DC7
RGB	rgb(102, 109, 199)
HSL	hsl(236, 46%, 59%)
HSV	hsv(236, 49%, 78%)
CMYK	cmyk(48.7%, 45.2%, 0%, 22%)
CIE-LAB	lab(49.36, 21.78, -47.90)
CIE-LCH	lch(49.36, 52.61, 294.45°)
OKLab	oklab(57.18% 0.0185 -0.1359)
OKLCH	oklch(57.18% 0.137 277.8)
XYZ	xyz(21.2537, 17.8844, 56.3539)
Luminance	0.1789 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DC7 #C7C066

analogous

#669EC7 #666DC7 #9066C7

triadic

#666DC7 #C7666D #6DC766

tetradic

#666DC7 #C7669E #C7C066 #66C790

square

#666DC7 #C7669E #C7C066 #66C790

split-complementary

#666DC7 #C79066 #9EC766

monochromatic

#303683 #4048B0 #666DC7 #9398D7 #C0C3E8

Accessibility & contrast

On white

4.59

#666DC7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.58

#666DC7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #666DC7

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DC7	#FFFFFF	#000000	##FFFFFF
##666DC7	1.00	4.59	4.58	4.59
#FFFFFF	4.59	1.00	21.00	1.00
#000000	4.58	21.00	1.00	21.00
##FFFFFF	4.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4879CA

Deuteranopia (green-blind)

#3F72C5

Tritanopia (blue-blind)

#418090

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #666dc7;
/* rgb */ color: rgb(102, 109, 199);
/* oklch */ color: oklch(57.2% 0.137 277.8);

Tailwind

colors: {
  custom: {
    50: '#9796d8',
    500: '#666dc7',
    950: '#000000',
  },
}

SCSS

$custom: #666dc7;
$custom-light: #9796d8;
$custom-dark: #000000;

JSON

{
  "hex": "#666dc7",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 199
  },
  "hsl": {
    "h": 235.67,
    "s": 46.411,
    "l": 59.02
  },
  "oklch": {
    "l": 0.57176,
    "c": 0.1372,
    "h": 277.8
  },
  "luminance": 0.17886
}

Semantic roles & 50–950 ramp

primary

#666DC7

secondary

#D7D5B1

accent

#CD52D6

background

#F9F9FD

surface

#F2F2FA

border

#CCCCD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #666DC7

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

Preview Lab → · Contrast checker → · Palette generator →