#666FAC#666FAC

#666FAC is a mid, moderate blue. Relative luminance 0.172; OKLCH L 56.0% C 0.095 H 276.5°. Best body text is #FFFFFF at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#666FAC
RGB	rgb(102, 111, 172)
HSL	hsl(232, 30%, 54%)
HSV	hsv(232, 41%, 67%)
CMYK	cmyk(40.7%, 35.5%, 0%, 32.5%)
CIE-LAB	lab(48.48, 12.42, -33.68)
CIE-LCH	lch(48.48, 35.89, 290.24°)
OKLab	oklab(56.04% 0.0107 -0.0944)
OKLCH	oklch(56.04% 0.095 276.5)
XYZ	xyz(18.6081, 17.1714, 41.3557)
Luminance	0.1717 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FAC #ACA366

analogous

#6692AC #666FAC #8066AC

triadic

#666FAC #AC666F #6FAC66

tetradic

#666FAC #AC6692 #ACA366 #66AC80

square

#666FAC #AC6692 #ACA366 #66AC80

split-complementary

#666FAC #AC8066 #92AC66

monochromatic

#353B62 #4B538A #666FAC #8E94C2 #B5BAD7

Accessibility & contrast

On white

4.74

#666FAC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.43

#666FAC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666FAC

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FAC	#FFFFFF	#000000	##FFFFFF
##666FAC	1.00	4.74	4.43	4.74
#FFFFFF	4.74	1.00	21.00	1.00
#000000	4.43	21.00	1.00	21.00
##FFFFFF	4.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A76AE

Deuteranopia (green-blind)

#5571AB

Tritanopia (blue-blind)

#507B85

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #666fac;
/* rgb */ color: rgb(102, 111, 172);
/* oklch */ color: oklch(56.0% 0.095 276.5);

Tailwind

colors: {
  custom: {
    50: '#9498c5',
    500: '#666fac',
    950: '#000000',
  },
}

SCSS

$custom: #666fac;
$custom-light: #9498c5;
$custom-dark: #000000;

JSON

{
  "hex": "#666fac",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 172
  },
  "hsl": {
    "h": 232.286,
    "s": 29.661,
    "l": 53.725
  },
  "oklch": {
    "l": 0.56042,
    "c": 0.09505,
    "h": 276.5
  },
  "luminance": 0.17172
}

Semantic roles & 50–950 ramp

primary

#666FAC

secondary

#C6C2A8

accent

#B962C6

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #666FAC

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

Preview Lab → · Contrast checker → · Palette generator →