#666CA7#666CA7

#666CA7 is a mid, moderate blue. Relative luminance 0.163; OKLCH L 55.1% C 0.092 H 278.5°. Best body text is #FFFFFF at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#666CA7
RGB	rgb(102, 108, 167)
HSL	hsl(234, 27%, 53%)
HSV	hsv(234, 39%, 65%)
CMYK	cmyk(38.9%, 35.3%, 0%, 34.5%)
CIE-LAB	lab(47.42, 12.80, -32.41)
CIE-LCH	lch(47.42, 34.85, 291.55°)
OKLab	oklab(55.15% 0.0136 -0.0908)
OKLCH	oklch(55.15% 0.092 278.5)
XYZ	xyz(17.8151, 16.3392, 38.7668)
Luminance	0.1634 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CA7 #A7A166

analogous

#668CA7 #666CA7 #8166A7

triadic

#666CA7 #A7666C #6CA766

tetradic

#666CA7 #A7668C #A7A166 #66A781

square

#666CA7 #A7668C #A7A166 #66A781

split-complementary

#666CA7 #A78166 #8CA766

monochromatic

#36395D #4C5184 #666CA7 #8D91BD #B4B7D4

Accessibility & contrast

On white

4.92

#666CA7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.27

#666CA7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666CA7

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CA7	#FFFFFF	#000000	##FFFFFF
##666CA7	1.00	4.92	4.27	4.92
#FFFFFF	4.92	1.00	21.00	1.00
#000000	4.27	21.00	1.00	21.00
##FFFFFF	4.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5973A9

Deuteranopia (green-blind)

#556EA6

Tritanopia (blue-blind)

#537882

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #666ca7;
/* rgb */ color: rgb(102, 108, 167);
/* oklch */ color: oklch(55.1% 0.092 278.5);

Tailwind

colors: {
  custom: {
    50: '#9496c1',
    500: '#666ca7',
    950: '#000000',
  },
}

SCSS

$custom: #666ca7;
$custom-light: #9496c1;
$custom-dark: #000000;

JSON

{
  "hex": "#666ca7",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 167
  },
  "hsl": {
    "h": 234.462,
    "s": 26.971,
    "l": 52.745
  },
  "oklch": {
    "l": 0.55148,
    "c": 0.09179,
    "h": 278.5
  },
  "luminance": 0.1634
}

Semantic roles & 50–950 ramp

primary

#666CA7

secondary

#C2C0A6

accent

#BB64C3

background

#F9F9FB

surface

#F2F1F7

border

#CCCBD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666CA7

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

Preview Lab → · Contrast checker → · Palette generator →