#66647C#66647C

#66647C is a mid, muted blue. Relative luminance 0.134; OKLCH L 51.4% C 0.038 H 288.8°. Best body text is #FFFFFF at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#66647C
RGB	rgb(102, 100, 124)
HSL	hsl(245, 11%, 44%)
HSV	hsv(245, 19%, 49%)
CMYK	cmyk(17.7%, 19.4%, 0%, 51.4%)
CIE-LAB	lab(43.35, 6.17, -13.09)
CIE-LCH	lch(43.35, 14.47, 295.22°)
OKLab	oklab(51.4% 0.0122 -0.0357)
OKLCH	oklch(51.4% 0.038 288.8)
XYZ	xyz(13.6739, 13.3942, 20.9298)
Luminance	0.1339 (WCAG relative)
Temperature	neutral
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66647C #7A7C64

analogous

#646E7C #66647C #72647C

triadic

#66647C #7C6664 #647C66

tetradic

#66647C #7C646E #7A7C64 #647C72

square

#66647C #7C646E #7A7C64 #647C72

split-complementary

#66647C #7C7264 #6E7C64

monochromatic

#2E2D38 #4A495A #66647C #85839B #A6A4B6

Accessibility & contrast

On white

5.71

#66647C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#66647C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #66647C

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66647C	#FFFFFF	#000000	##FFFFFF
##66647C	1.00	5.71	3.68	5.71
#FFFFFF	5.71	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E677D

Deuteranopia (green-blind)

#5E667B

Tritanopia (blue-blind)

#62686C

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #66647c;
/* rgb */ color: rgb(102, 100, 124);
/* oklch */ color: oklch(51.4% 0.038 288.8);

Tailwind

colors: {
  custom: {
    50: '#9290a2',
    500: '#66647c',
    950: '#000000',
  },
}

SCSS

$custom: #66647c;
$custom-light: #9290a2;
$custom-dark: #000000;

JSON

{
  "hex": "#66647c",
  "rgb": {
    "r": 102,
    "g": 100,
    "b": 124
  },
  "hsl": {
    "h": 245,
    "s": 10.714,
    "l": 43.922
  },
  "oklch": {
    "l": 0.51395,
    "c": 0.03768,
    "h": 288.8
  },
  "luminance": 0.13394
}

Semantic roles & 50–950 ramp

primary

#66647C

secondary

#A4A597

accent

#B474AE

background

#F8F8F9

surface

#F0F0F2

border

#CBCBCC

text

#0D0C0F

muted

#7D7D7E

Preview Lab

Preview with #66647C

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

Preview Lab → · Contrast checker → · Palette generator →