#666DAE#666DAE

#666DAE is a mid, moderate blue. Relative luminance 0.168; OKLCH L 55.7% C 0.101 H 277.9°. Best body text is #FFFFFF at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#666DAE
RGB	rgb(102, 109, 174)
HSL	hsl(234, 31%, 54%)
HSV	hsv(234, 41%, 68%)
CMYK	cmyk(41.4%, 37.4%, 0%, 31.8%)
CIE-LAB	lab(48.03, 14.23, -35.54)
CIE-LCH	lch(48.03, 38.28, 291.82°)
OKLab	oklab(55.73% 0.0139 -0.0999)
OKLCH	oklch(55.73% 0.101 277.9)
XYZ	xyz(18.5858, 16.8172, 42.3029)
Luminance	0.1682 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DAE #AEA766

analogous

#6691AE #666DAE #8366AE

triadic

#666DAE #AE666D #6DAE66

tetradic

#666DAE #AE6691 #AEA766 #66AE83

square

#666DAE #AE6691 #AEA766 #66AE83

split-complementary

#666DAE #AE8366 #91AE66

monochromatic

#353A64 #4A518C #666DAE #8E93C3 #B6B9D8

Accessibility & contrast

On white

4.81

#666DAE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.36

#666DAE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666DAE

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DAE	#FFFFFF	#000000	##FFFFFF
##666DAE	1.00	4.81	4.36	4.81
#FFFFFF	4.81	1.00	21.00	1.00
#000000	4.36	21.00	1.00	21.00
##FFFFFF	4.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5775B1

Deuteranopia (green-blind)

#526FAC

Tritanopia (blue-blind)

#507A85

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #666dae;
/* rgb */ color: rgb(102, 109, 174);
/* oklch */ color: oklch(55.7% 0.101 277.9);

Tailwind

colors: {
  custom: {
    50: '#9596c6',
    500: '#666dae',
    950: '#000000',
  },
}

SCSS

$custom: #666dae;
$custom-light: #9596c6;
$custom-dark: #000000;

JSON

{
  "hex": "#666dae",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 174
  },
  "hsl": {
    "h": 234.167,
    "s": 30.769,
    "l": 54.118
  },
  "oklch": {
    "l": 0.55731,
    "c": 0.10082,
    "h": 277.9
  },
  "luminance": 0.16818
}

Semantic roles & 50–950 ramp

primary

#666DAE

secondary

#C7C4A9

accent

#BD61C7

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #666DAE

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

Preview Lab → · Contrast checker → · Palette generator →