#666BBE#666BBE

#666BBE is a mid, vivid blue. Relative luminance 0.171; OKLCH L 56.2% C 0.127 H 278.9°. Best body text is #FFFFFF at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#666BBE
RGB	rgb(102, 107, 190)
HSL	hsl(237, 40%, 57%)
HSV	hsv(237, 46%, 75%)
CMYK	cmyk(46.3%, 43.7%, 0%, 25.5%)
CIE-LAB	lab(48.33, 20.25, -44.35)
CIE-LCH	lch(48.33, 48.75, 294.54°)
OKLab	oklab(56.24% 0.0196 -0.1256)
OKLCH	oklch(56.24% 0.127 278.9)
XYZ	xyz(20.0286, 17.0569, 50.9422)
Luminance	0.1706 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BBE #BEB966

analogous

#6697BE #666BBE #8D66BE

triadic

#666BBE #BE666B #6BBE66

tetradic

#666BBE #BE6697 #BEB966 #66BE8D

square

#666BBE #BE6697 #BEB966 #66BE8D

split-complementary

#666BBE #BE8D66 #97BE66

monochromatic

#333677 #454AA2 #666BBE #9195D0 #BCBEE2

Accessibility & contrast

On white

4.76

#666BBE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.41

#666BBE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666BBE

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BBE	#FFFFFF	#000000	##FFFFFF
##666BBE	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)

#4B76C1

Deuteranopia (green-blind)

#4470BC

Tritanopia (blue-blind)

#477C8B

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #666bbe;
/* rgb */ color: rgb(102, 107, 190);
/* oklch */ color: oklch(56.2% 0.127 278.9);

Tailwind

colors: {
  custom: {
    50: '#9695d2',
    500: '#666bbe',
    950: '#000000',
  },
}

SCSS

$custom: #666bbe;
$custom-light: #9695d2;
$custom-dark: #000000;

JSON

{
  "hex": "#666bbe",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 190
  },
  "hsl": {
    "h": 236.591,
    "s": 40.367,
    "l": 57.255
  },
  "oklch": {
    "l": 0.56235,
    "c": 0.12708,
    "h": 278.9
  },
  "luminance": 0.17058
}

Semantic roles & 50–950 ramp

primary

#666BBE

secondary

#D2D0AE

accent

#C958D0

background

#F9F9FC

surface

#F2F1F9

border

#CCCBD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #666BBE

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

Preview Lab → · Contrast checker → · Palette generator →