#666DB4#666DB4

#666DB4 is a mid, moderate blue. Relative luminance 0.171; OKLCH L 56.1% C 0.110 H 278.0°. Best body text is #FFFFFF at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#666DB4
RGB	rgb(102, 109, 180)
HSL	hsl(235, 34%, 55%)
HSV	hsv(235, 43%, 71%)
CMYK	cmyk(43.3%, 39.4%, 0%, 29.4%)
CIE-LAB	lab(48.33, 16.00, -38.56)
CIE-LCH	lch(48.33, 41.75, 292.54°)
OKLab	oklab(56.06% 0.0152 -0.1086)
OKLCH	oklch(56.06% 0.11 278)
XYZ	xyz(19.1839, 17.0564, 45.4526)
Luminance	0.1706 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DB4 #B4AD66

analogous

#6694B4 #666DB4 #8666B4

triadic

#666DB4 #B4666D #6DB466

tetradic

#666DB4 #B46694 #B4AD66 #66B486

square

#666DB4 #B46694 #B4AD66 #66B486

split-complementary

#666DB4 #B48666 #94B466

monochromatic

#34396B #494F94 #666DB4 #8F94C8 #B8BBDC

Accessibility & contrast

On white

4.76

#666DB4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.41

#666DB4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666DB4

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DB4	#FFFFFF	#000000	##FFFFFF
##666DB4	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)

#5476B7

Deuteranopia (green-blind)

#4E70B2

Tritanopia (blue-blind)

#4D7B88

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #666db4;
/* rgb */ color: rgb(102, 109, 180);
/* oklch */ color: oklch(56.1% 0.110 278.0);

Tailwind

colors: {
  custom: {
    50: '#9596cb',
    500: '#666db4',
    950: '#000000',
  },
}

SCSS

$custom: #666db4;
$custom-light: #9596cb;
$custom-dark: #000000;

JSON

{
  "hex": "#666db4",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 180
  },
  "hsl": {
    "h": 234.615,
    "s": 34.211,
    "l": 55.294
  },
  "oklch": {
    "l": 0.56061,
    "c": 0.10969,
    "h": 278
  },
  "luminance": 0.17057
}

Semantic roles & 50–950 ramp

primary

#666DB4

secondary

#CBC8AB

accent

#C15ECA

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0E0D13

muted

#7E7E82

Preview Lab

Preview with #666DB4

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

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