#666D64#666D64

#666D64 is a mid, near-neutral grey. Relative luminance 0.147; OKLCH L 52.6% C 0.016 H 138.7°. Best body text is #FFFFFF at 5.33:1 contrast (WCAG AA passes).

Color values

HEX	#666D64
RGB	rgb(102, 109, 100)
HSL	hsl(107, 4%, 41%)
HSV	hsv(107, 8%, 43%)
CMYK	cmyk(6.4%, 0%, 8.3%, 57.3%)
CIE-LAB	lab(45.20, -4.53, 4.11)
CIE-LCH	lch(45.20, 6.12, 137.79°)
OKLab	oklab(52.59% -0.0122 0.0107)
OKLCH	oklch(52.59% 0.016 138.7)
XYZ	xyz(13.2480, 14.6821, 14.1901)
Luminance	0.1468 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666D64 #6B646D

analogous

#6A6D64 #666D64 #646D66

triadic

#666D64 #64666D #6D6466

tetradic

#666D64 #646A6D #6B646D #6D6664

square

#666D64 #646A6D #6B646D #6D6664

split-complementary

#666D64 #66646D #6D646A

monochromatic

#2A2D29 #484D47 #666D64 #848C82 #A4AAA2

Accessibility & contrast

On white

5.33

#666D64 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.94

#666D64 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666D64

5.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666D64	#FFFFFF	#000000	##FFFFFF
##666D64	1.00	5.33	3.94	5.33
#FFFFFF	5.33	1.00	21.00	1.00
#000000	3.94	21.00	1.00	21.00
##FFFFFF	5.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E6B64

Deuteranopia (green-blind)

#6C6B64

Tritanopia (blue-blind)

#666C6A

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #666d64;
/* rgb */ color: rgb(102, 109, 100);
/* oklch */ color: oklch(52.6% 0.016 138.7);

Tailwind

colors: {
  custom: {
    50: '#919690',
    500: '#666d64',
    950: '#000000',
  },
}

SCSS

$custom: #666d64;
$custom-light: #919690;
$custom-dark: #000000;

JSON

{
  "hex": "#666d64",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 100
  },
  "hsl": {
    "h": 106.667,
    "s": 4.306,
    "l": 40.98
  },
  "oklch": {
    "l": 0.52588,
    "c": 0.01627,
    "h": 138.7
  },
  "luminance": 0.14682
}

Semantic roles & 50–950 ramp

primary

#666D64

secondary

#98939A

accent

#7AADA2

background

#F8F9F8

surface

#F0F2F0

border

#CBCCCB

text

#0C0D0C

muted

#7D7E7D

Preview Lab

Preview with #666D64

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

Preview Lab → · Contrast checker → · Palette generator →