#666BB7#666BB7

#666BB7 is a mid, moderate blue. Relative luminance 0.168; OKLCH L 55.8% C 0.117 H 279.0°. Best body text is #FFFFFF at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#666BB7
RGB	rgb(102, 107, 183)
HSL	hsl(236, 36%, 56%)
HSV	hsv(236, 44%, 72%)
CMYK	cmyk(44.3%, 41.5%, 0%, 28.2%)
CIE-LAB	lab(47.95, 18.13, -40.89)
CIE-LCH	lch(47.95, 44.73, 293.91°)
OKLab	oklab(55.82% 0.0184 -0.1155)
OKLCH	oklch(55.82% 0.117 279)
XYZ	xyz(19.2819, 16.7582, 47.0092)
Luminance	0.1676 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BB7 #B7B266

analogous

#6693B7 #666BB7 #8966B7

triadic

#666BB7 #B7666B #6BB766

tetradic

#666BB7 #B76693 #B7B266 #66B789

square

#666BB7 #B76693 #B7B266 #66B789

split-complementary

#666BB7 #B78966 #93B766

monochromatic

#34386F #484D98 #666BB7 #9093CB #B9BCDE

Accessibility & contrast

On white

4.83

#666BB7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.35

#666BB7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666BB7

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BB7	#FFFFFF	#000000	##FFFFFF
##666BB7	1.00	4.83	4.35	4.83
#FFFFFF	4.83	1.00	21.00	1.00
#000000	4.35	21.00	1.00	21.00
##FFFFFF	4.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F75BA

Deuteranopia (green-blind)

#496FB5

Tritanopia (blue-blind)

#4B7A88

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #666bb7;
/* rgb */ color: rgb(102, 107, 183);
/* oklch */ color: oklch(55.8% 0.117 279.0);

Tailwind

colors: {
  custom: {
    50: '#9695cd',
    500: '#666bb7',
    950: '#000000',
  },
}

SCSS

$custom: #666bb7;
$custom-light: #9695cd;
$custom-dark: #000000;

JSON

{
  "hex": "#666bb7",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 183
  },
  "hsl": {
    "h": 236.296,
    "s": 36,
    "l": 55.882
  },
  "oklch": {
    "l": 0.55824,
    "c": 0.11691,
    "h": 279
  },
  "luminance": 0.16759
}

Semantic roles & 50–950 ramp

primary

#666BB7

secondary

#CDCBAC

accent

#C55CCC

background

#F9F9FC

surface

#F2F1F9

border

#CCCBD2

text

#0E0D13

muted

#7E7E82

Preview Lab

Preview with #666BB7

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

Preview Lab → · Contrast checker → · Palette generator →