#666CBD#666CBD

#666CBD is a mid, vivid blue. Relative luminance 0.172; OKLCH L 56.4% C 0.124 H 278.4°. Best body text is #FFFFFF at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#666CBD
RGB	rgb(102, 108, 189)
HSL	hsl(236, 40%, 57%)
HSV	hsv(236, 46%, 74%)
CMYK	cmyk(46%, 42.9%, 0%, 25.9%)
CIE-LAB	lab(48.54, 19.33, -43.44)
CIE-LCH	lch(48.54, 47.54, 293.99°)
OKLab	oklab(56.38% 0.0182 -0.1229)
OKLCH	oklch(56.38% 0.124 278.4)
XYZ	xyz(20.0246, 17.2230, 50.4035)
Luminance	0.1722 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CBD #BDB766

analogous

#6698BD #666CBD #8C66BD

triadic

#666CBD #BD666C #6CBD66

tetradic

#666CBD #BD6698 #BDB766 #66BD8C

square

#666CBD #BD6698 #BDB766 #66BD8C

split-complementary

#666CBD #BD8C66 #98BD66

monochromatic

#333776 #454CA1 #666CBD #9195CF #BCBEE2

Accessibility & contrast

On white

4.72

#666CBD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#666CBD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666CBD

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CBD	#FFFFFF	#000000	##FFFFFF
##666CBD	1.00	4.72	4.44	4.72
#FFFFFF	4.72	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D77C0

Deuteranopia (green-blind)

#4670BB

Tritanopia (blue-blind)

#487D8B

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #666cbd;
/* rgb */ color: rgb(102, 108, 189);
/* oklch */ color: oklch(56.4% 0.124 278.4);

Tailwind

colors: {
  custom: {
    50: '#9696d1',
    500: '#666cbd',
    950: '#000000',
  },
}

SCSS

$custom: #666cbd;
$custom-light: #9696d1;
$custom-dark: #000000;

JSON

{
  "hex": "#666cbd",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 189
  },
  "hsl": {
    "h": 235.862,
    "s": 39.726,
    "l": 57.059
  },
  "oklch": {
    "l": 0.56376,
    "c": 0.12423,
    "h": 278.4
  },
  "luminance": 0.17224
}

Semantic roles & 50–950 ramp

primary

#666CBD

secondary

#D1CFAE

accent

#C758D0

background

#F9F9FC

surface

#F2F1F9

border

#CCCBD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #666CBD

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

Preview Lab → · Contrast checker → · Palette generator →