#666AB0#666AB0

#666AB0 is a mid, moderate blue. Relative luminance 0.163; OKLCH L 55.2% C 0.108 H 279.7°. Best body text is #FFFFFF at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#666AB0
RGB	rgb(102, 106, 176)
HSL	hsl(237, 32%, 55%)
HSV	hsv(237, 42%, 69%)
CMYK	cmyk(42%, 39.8%, 0%, 31%)
CIE-LAB	lab(47.32, 16.66, -37.82)
CIE-LCH	lch(47.32, 41.33, 293.77°)
OKLab	oklab(55.22% 0.0183 -0.1065)
OKLCH	oklch(55.22% 0.108 279.7)
XYZ	xyz(18.4677, 16.2666, 43.2326)
Luminance	0.1627 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666AB0 #B0AC66

analogous

#668FB0 #666AB0 #8766B0

triadic

#666AB0 #B0666A #6AB066

tetradic

#666AB0 #B0668F #B0AC66 #66B087

square

#666AB0 #B0668F #B0AC66 #66B087

split-complementary

#666AB0 #B08766 #8FB066

monochromatic

#353867 #4A4E8F #666AB0 #8E91C5 #B7B9DA

Accessibility & contrast

On white

4.94

#666AB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.25

#666AB0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666AB0

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666AB0	#FFFFFF	#000000	##FFFFFF
##666AB0	1.00	4.94	4.25	4.94
#FFFFFF	4.94	1.00	21.00	1.00
#000000	4.25	21.00	1.00	21.00
##FFFFFF	4.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5173B3

Deuteranopia (green-blind)

#4D6EAE

Tritanopia (blue-blind)

#4F7884

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #666ab0;
/* rgb */ color: rgb(102, 106, 176);
/* oklch */ color: oklch(55.2% 0.108 279.7);

Tailwind

colors: {
  custom: {
    50: '#9594c8',
    500: '#666ab0',
    950: '#000000',
  },
}

SCSS

$custom: #666ab0;
$custom-light: #9594c8;
$custom-dark: #000000;

JSON

{
  "hex": "#666ab0",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 176
  },
  "hsl": {
    "h": 236.757,
    "s": 31.897,
    "l": 54.51
  },
  "oklch": {
    "l": 0.55222,
    "c": 0.10806,
    "h": 279.7
  },
  "luminance": 0.16267
}

Semantic roles & 50–950 ramp

primary

#666AB0

secondary

#C9C7A9

accent

#C260C8

background

#F9F9FC

surface

#F2F1F8

border

#CCCBD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #666AB0

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

Preview Lab → · Contrast checker → · Palette generator →