#645E66#645E66

#645E66 is a mid, near-neutral grey. Relative luminance 0.117; OKLCH L 49.0% C 0.015 H 317.7°. Best body text is #FFFFFF at 6.30:1 contrast (WCAG AA passes).

Color values

HEX	#645E66
RGB	rgb(100, 94, 102)
HSL	hsl(285, 4%, 38%)
HSV	hsv(285, 8%, 40%)
CMYK	cmyk(2%, 7.8%, 0%, 60%)
CIE-LAB	lab(40.69, 4.05, -3.69)
CIE-LCH	lch(40.69, 5.48, 317.60°)
OKLab	oklab(49.03% 0.0108 -0.0098)
OKLCH	oklch(49.03% 0.015 317.7)
XYZ	xyz(11.6561, 11.6741, 14.2071)
Luminance	0.1167 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645E66 #60665E

analogous

#605E66 #645E66 #665E64

triadic

#645E66 #66645E #5E6664

tetradic

#645E66 #66605E #60665E #5E6466

square

#645E66 #66605E #60665E #5E6466

split-complementary

#645E66 #64665E #5E6660

monochromatic

#262326 #454146 #645E66 #837B86 #A19BA3

Accessibility & contrast

On white

6.30

#645E66 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.33

#645E66 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645E66

6.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645E66	#FFFFFF	#000000	##FFFFFF
##645E66	1.00	6.30	3.33	6.30
#FFFFFF	6.30	1.00	21.00	1.00
#000000	3.33	21.00	1.00	21.00
##FFFFFF	6.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D6066

Deuteranopia (green-blind)

#5E6066

Tritanopia (blue-blind)

#645F61

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #645e66;
/* rgb */ color: rgb(100, 94, 102);
/* oklch */ color: oklch(49.0% 0.015 317.7);

Tailwind

colors: {
  custom: {
    50: '#908b91',
    500: '#645e66',
    950: '#000000',
  },
}

SCSS

$custom: #645e66;
$custom-light: #908b91;
$custom-dark: #000000;

JSON

{
  "hex": "#645e66",
  "rgb": {
    "r": 100,
    "g": 94,
    "b": 102
  },
  "hsl": {
    "h": 285,
    "s": 4.082,
    "l": 38.431
  },
  "oklch": {
    "l": 0.49026,
    "c": 0.0146,
    "h": 317.7
  },
  "luminance": 0.11674
}

Semantic roles & 50–950 ramp

primary

#645E66

secondary

#8E938D

accent

#AD7B87

background

#F8F8F8

surface

#F0F0F0

border

#CBCBCB

text

#0C0C0C

muted

#7D7D7D

Preview Lab

Preview with #645E66

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

Preview Lab → · Contrast checker → · Palette generator →