#666FA9#666FA9

#666FA9 is a mid, moderate blue. Relative luminance 0.171; OKLCH L 55.9% C 0.091 H 276.3°. Best body text is #FFFFFF at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#666FA9
RGB	rgb(102, 111, 169)
HSL	hsl(232, 28%, 53%)
HSV	hsv(232, 40%, 66%)
CMYK	cmyk(39.6%, 34.3%, 0%, 33.7%)
CIE-LAB	lab(48.33, 11.55, -32.15)
CIE-LCH	lch(48.33, 34.16, 289.76°)
OKLab	oklab(55.89% 0.01 -0.09)
OKLCH	oklch(55.89% 0.091 276.3)
XYZ	xyz(18.3233, 17.0574, 39.8554)
Luminance	0.1706 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FA9 #A9A066

analogous

#6690A9 #666FA9 #7E66A9

triadic

#666FA9 #A9666F #6FA966

tetradic

#666FA9 #A96690 #A9A066 #66A97E

square

#666FA9 #A96690 #A9A066 #66A97E

split-complementary

#666FA9 #A97E66 #90A966

monochromatic

#353B5F #4B5386 #666FA9 #8D94BF #B4B9D5

Accessibility & contrast

On white

4.76

#666FA9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.41

#666FA9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666FA9

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FA9	#FFFFFF	#000000	##FFFFFF
##666FA9	1.00	4.76	4.41	4.76
#FFFFFF	4.76	1.00	21.00	1.00
#000000	4.41	21.00	1.00	21.00
##FFFFFF	4.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C76AB

Deuteranopia (green-blind)

#5770A8

Tritanopia (blue-blind)

#527A84

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #666fa9;
/* rgb */ color: rgb(102, 111, 169);
/* oklch */ color: oklch(55.9% 0.091 276.3);

Tailwind

colors: {
  custom: {
    50: '#9498c3',
    500: '#666fa9',
    950: '#000000',
  },
}

SCSS

$custom: #666fa9;
$custom-light: #9498c3;
$custom-dark: #000000;

JSON

{
  "hex": "#666fa9",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 169
  },
  "hsl": {
    "h": 231.94,
    "s": 28.033,
    "l": 53.137
  },
  "oklch": {
    "l": 0.55885,
    "c": 0.09056,
    "h": 276.3
  },
  "luminance": 0.17058
}

Semantic roles & 50–950 ramp

primary

#666FA9

secondary

#C4C0A7

accent

#B763C4

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666FA9

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

Preview Lab → · Contrast checker → · Palette generator →