#666DB7#666DB7

#666DB7 is a mid, moderate blue. Relative luminance 0.172; OKLCH L 56.2% C 0.114 H 278.0°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#666DB7
RGB	rgb(102, 109, 183)
HSL	hsl(235, 36%, 56%)
HSV	hsv(235, 44%, 72%)
CMYK	cmyk(44.3%, 40.4%, 0%, 28.2%)
CIE-LAB	lab(48.49, 16.90, -40.05)
CIE-LCH	lch(48.49, 43.47, 292.88°)
OKLab	oklab(56.23% 0.0158 -0.113)
OKLCH	oklch(56.23% 0.114 278)
XYZ	xyz(19.4928, 17.1800, 47.0795)
Luminance	0.1718 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DB7 #B7B066

analogous

#6695B7 #666DB7 #8766B7

triadic

#666DB7 #B7666D #6DB766

tetradic

#666DB7 #B76695 #B7B066 #66B787

square

#666DB7 #B76695 #B7B066 #66B787

split-complementary

#666DB7 #B78766 #95B766

monochromatic

#34396F #484F98 #666DB7 #9095CB #B9BCDE

Accessibility & contrast

On white

4.73

#666DB7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#666DB7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666DB7

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DB7	#FFFFFF	#000000	##FFFFFF
##666DB7	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5276BA

Deuteranopia (green-blind)

#4C70B5

Tritanopia (blue-blind)

#4B7C89

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #666db7;
/* rgb */ color: rgb(102, 109, 183);
/* oklch */ color: oklch(56.2% 0.114 278.0);

Tailwind

colors: {
  custom: {
    50: '#9696cd',
    500: '#666db7',
    950: '#000000',
  },
}

SCSS

$custom: #666db7;
$custom-light: #9696cd;
$custom-dark: #000000;

JSON

{
  "hex": "#666db7",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 183
  },
  "hsl": {
    "h": 234.815,
    "s": 36,
    "l": 55.882
  },
  "oklch": {
    "l": 0.56231,
    "c": 0.1141,
    "h": 278
  },
  "luminance": 0.17181
}

Semantic roles & 50–950 ramp

primary

#666DB7

secondary

#CDCAAC

accent

#C25CCC

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0E0D13

muted

#7E7E82

Preview Lab

Preview with #666DB7

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

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