#666FA7#666FA7

#666FA7 is a mid, moderate blue. Relative luminance 0.170; OKLCH L 55.8% C 0.088 H 276.2°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#666FA7
RGB	rgb(102, 111, 167)
HSL	hsl(232, 27%, 53%)
HSV	hsv(232, 39%, 65%)
CMYK	cmyk(38.9%, 33.5%, 0%, 34.5%)
CIE-LAB	lab(48.24, 10.97, -31.13)
CIE-LCH	lch(48.24, 33.00, 289.41°)
OKLab	oklab(55.78% 0.0095 -0.0871)
OKLCH	oklch(55.78% 0.088 276.2)
XYZ	xyz(18.1369, 16.9829, 38.8741)
Luminance	0.1698 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FA7 #A79E66

analogous

#6690A7 #666FA7 #7D66A7

triadic

#666FA7 #A7666F #6FA766

tetradic

#666FA7 #A76690 #A79E66 #66A77D

square

#666FA7 #A76690 #A79E66 #66A77D

split-complementary

#666FA7 #A77D66 #90A766

monochromatic

#363B5D #4C5484 #666FA7 #8D94BD #B4B8D4

Accessibility & contrast

On white

4.78

#666FA7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#666FA7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666FA7

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FA7	#FFFFFF	#000000	##FFFFFF
##666FA7	1.00	4.78	4.40	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D75A9

Deuteranopia (green-blind)

#5870A6

Tritanopia (blue-blind)

#537A83

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #666fa7;
/* rgb */ color: rgb(102, 111, 167);
/* oklch */ color: oklch(55.8% 0.088 276.2);

Tailwind

colors: {
  custom: {
    50: '#9498c1',
    500: '#666fa7',
    950: '#000000',
  },
}

SCSS

$custom: #666fa7;
$custom-light: #9498c1;
$custom-dark: #000000;

JSON

{
  "hex": "#666fa7",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 167
  },
  "hsl": {
    "h": 231.692,
    "s": 26.971,
    "l": 52.745
  },
  "oklch": {
    "l": 0.55782,
    "c": 0.08757,
    "h": 276.2
  },
  "luminance": 0.16984
}

Semantic roles & 50–950 ramp

primary

#666FA7

secondary

#C2BFA6

accent

#B664C3

background

#F9F9FB

surface

#F2F2F7

border

#CCCCD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666FA7

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

Preview Lab → · Contrast checker → · Palette generator →