#666CA0#666CA0

#666CA0 is a mid, moderate blue. Relative luminance 0.161; OKLCH L 54.8% C 0.081 H 278.3°. Best body text is #FFFFFF at 4.98:1 contrast (WCAG AA passes).

Color values

HEX	#666CA0
RGB	rgb(102, 108, 160)
HSL	hsl(234, 23%, 51%)
HSV	hsv(234, 36%, 63%)
CMYK	cmyk(36.2%, 32.5%, 0%, 37.3%)
CIE-LAB	lab(47.09, 10.80, -28.82)
CIE-LCH	lch(47.09, 30.77, 290.54°)
OKLab	oklab(54.79% 0.0117 -0.0804)
OKLCH	oklch(54.79% 0.081 278.3)
XYZ	xyz(17.1854, 16.0873, 35.4506)
Luminance	0.1609 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CA0 #A09A66

analogous

#6689A0 #666CA0 #7D66A0

triadic

#666CA0 #A0666C #6CA066

tetradic

#666CA0 #A06689 #A09A66 #66A07D

square

#666CA0 #A06689 #A09A66 #66A07D

split-complementary

#666CA0 #A07D66 #89A066

monochromatic

#353956 #4D527C #666CA0 #8C90B7 #B2B5CF

Accessibility & contrast

On white

4.98

#666CA0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.22

#666CA0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666CA0

4.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CA0	#FFFFFF	#000000	##FFFFFF
##666CA0	1.00	4.98	4.22	4.98
#FFFFFF	4.98	1.00	21.00	1.00
#000000	4.22	21.00	1.00	21.00
##FFFFFF	4.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C72A2

Deuteranopia (green-blind)

#586E9F

Tritanopia (blue-blind)

#56767F

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #666ca0;
/* rgb */ color: rgb(102, 108, 160);
/* oklch */ color: oklch(54.8% 0.081 278.3);

Tailwind

colors: {
  custom: {
    50: '#9396bc',
    500: '#666ca0',
    950: '#000000',
  },
}

SCSS

$custom: #666ca0;
$custom-light: #9396bc;
$custom-dark: #000000;

JSON

{
  "hex": "#666ca0",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 160
  },
  "hsl": {
    "h": 233.793,
    "s": 23.387,
    "l": 51.373
  },
  "oklch": {
    "l": 0.54788,
    "c": 0.08123,
    "h": 278.3
  },
  "luminance": 0.16088
}

Semantic roles & 50–950 ramp

primary

#666CA0

secondary

#BEBBA4

accent

#B768C0

background

#F9F9FB

surface

#F1F1F6

border

#CBCBD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666CA0

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

Preview Lab → · Contrast checker → · Palette generator →