#666CA4#666CA4

#666CA4 is a mid, moderate blue. Relative luminance 0.162; OKLCH L 55.0% C 0.087 H 278.4°. Best body text is #FFFFFF at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#666CA4
RGB	rgb(102, 108, 164)
HSL	hsl(234, 25%, 52%)
HSV	hsv(234, 38%, 64%)
CMYK	cmyk(37.8%, 34.1%, 0%, 35.7%)
CIE-LAB	lab(47.27, 11.94, -30.88)
CIE-LCH	lch(47.27, 33.10, 291.14°)
OKLab	oklab(54.99% 0.0128 -0.0863)
OKLCH	oklch(54.99% 0.087 278.4)
XYZ	xyz(17.5410, 16.2296, 37.3232)
Luminance	0.1623 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CA4 #A49E66

analogous

#668BA4 #666CA4 #7F66A4

triadic

#666CA4 #A4666C #6CA466

tetradic

#666CA4 #A4668B #A49E66 #66A47F

square

#666CA4 #A4668B #A49E66 #66A47F

split-complementary

#666CA4 #A47F66 #8BA466

monochromatic

#36395A #4C5180 #666CA4 #8C91BB #B3B6D2

Accessibility & contrast

On white

4.95

#666CA4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.25

#666CA4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666CA4

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CA4	#FFFFFF	#000000	##FFFFFF
##666CA4	1.00	4.95	4.25	4.95
#FFFFFF	4.95	1.00	21.00	1.00
#000000	4.25	21.00	1.00	21.00
##FFFFFF	4.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A73A6

Deuteranopia (green-blind)

#566EA3

Tritanopia (blue-blind)

#547780

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #666ca4;
/* rgb */ color: rgb(102, 108, 164);
/* oklch */ color: oklch(55.0% 0.087 278.4);

Tailwind

colors: {
  custom: {
    50: '#9496bf',
    500: '#666ca4',
    950: '#000000',
  },
}

SCSS

$custom: #666ca4;
$custom-light: #9496bf;
$custom-dark: #000000;

JSON

{
  "hex": "#666ca4",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 164
  },
  "hsl": {
    "h": 234.194,
    "s": 25.41,
    "l": 52.157
  },
  "oklch": {
    "l": 0.54992,
    "c": 0.08728,
    "h": 278.4
  },
  "luminance": 0.1623
}

Semantic roles & 50–950 ramp

primary

#666CA4

secondary

#C0BEA5

accent

#B966C2

background

#F9F9FB

surface

#F2F1F7

border

#CCCBD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666CA4

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

Preview Lab → · Contrast checker → · Palette generator →