#666E8D#666E8D

#666E8D is a mid, muted blue. Relative luminance 0.159; OKLCH L 54.3% C 0.049 H 273.4°. Best body text is #FFFFFF at 5.02:1 contrast (WCAG AA passes).

Color values

HEX	#666E8D
RGB	rgb(102, 110, 141)
HSL	hsl(228, 16%, 48%)
HSV	hsv(228, 28%, 55%)
CMYK	cmyk(27.7%, 22%, 0%, 44.7%)
CIE-LAB	lab(46.84, 4.41, -17.96)
CIE-LCH	lch(46.84, 18.49, 283.79°)
OKLab	oklab(54.33% 0.0029 -0.0494)
OKLCH	oklch(54.33% 0.049 273.4)
XYZ	xyz(15.8619, 15.8993, 27.4273)
Luminance	0.1590 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666E8D #8D8566

analogous

#66818D #666E8D #71668D

triadic

#666E8D #8D666E #6E8D66

tetradic

#666E8D #8D6681 #8D8566 #668D71

square

#666E8D #8D6681 #8D8566 #668D71

split-complementary

#666E8D #8D7166 #818D66

monochromatic

#333746 #4C5269 #666E8D #888EA9 #ABB0C2

Accessibility & contrast

On white

5.02

#666E8D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.18

#666E8D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666E8D

5.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666E8D	#FFFFFF	#000000	##FFFFFF
##666E8D	1.00	5.02	4.18	5.02
#FFFFFF	5.02	1.00	21.00	1.00
#000000	4.18	21.00	1.00	21.00
##FFFFFF	5.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#65718E

Deuteranopia (green-blind)

#626E8C

Tritanopia (blue-blind)

#5C7478

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #666e8d;
/* rgb */ color: rgb(102, 110, 141);
/* oklch */ color: oklch(54.3% 0.049 273.4);

Tailwind

colors: {
  custom: {
    50: '#9297ae',
    500: '#666e8d',
    950: '#000000',
  },
}

SCSS

$custom: #666e8d;
$custom-light: #9297ae;
$custom-dark: #000000;

JSON

{
  "hex": "#666e8d",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 141
  },
  "hsl": {
    "h": 227.692,
    "s": 16.049,
    "l": 47.647
  },
  "oklch": {
    "l": 0.5433,
    "c": 0.04948,
    "h": 273.4
  },
  "luminance": 0.159
}

Semantic roles & 50–950 ramp

primary

#666E8D

secondary

#B1AD9E

accent

#AA6FB9

background

#F9F9FA

surface

#F1F2F4

border

#CBCCCE

text

#0D0D10

muted

#7E7E7F

Preview Lab

Preview with #666E8D

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

Preview Lab → · Contrast checker → · Palette generator →