#645A64#645A64

#645A64 is a mid, muted grey. Relative luminance 0.109; OKLCH L 48.1% C 0.020 H 325.9°. Best body text is #FFFFFF at 6.59:1 contrast (WCAG AA passes).

Color values

HEX	#645A64
RGB	rgb(100, 90, 100)
HSL	hsl(300, 5%, 37%)
HSV	hsv(300, 10%, 39%)
CMYK	cmyk(0%, 10%, 0%, 60.8%)
CIE-LAB	lab(39.48, 6.07, -4.26)
CIE-LCH	lch(39.48, 7.41, 324.95°)
OKLab	oklab(48.06% 0.0167 -0.0113)
OKLCH	oklch(48.06% 0.02 325.9)
XYZ	xyz(11.2116, 10.9419, 13.5755)
Luminance	0.1094 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645A64 #5A645A

analogous

#5F5A64 #645A64 #645A5F

triadic

#645A64 #64645A #5A6464

tetradic

#645A64 #645F5A #5A645A #5A5F64

square

#645A64 #645F5A #5A645A #5A5F64

split-complementary

#645A64 #5F645A #5A645F

monochromatic

#242024 #443D44 #645A64 #847784 #A197A1

Accessibility & contrast

On white

6.59

#645A64 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#645A64 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645A64

6.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645A64	#FFFFFF	#000000	##FFFFFF
##645A64	1.00	6.59	3.19	6.59
#FFFFFF	6.59	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#595C64

Deuteranopia (green-blind)

#5B5D64

Tritanopia (blue-blind)

#655B5D

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #645a64;
/* rgb */ color: rgb(100, 90, 100);
/* oklch */ color: oklch(48.1% 0.020 325.9);

Tailwind

colors: {
  custom: {
    50: '#908890',
    500: '#645a64',
    950: '#000000',
  },
}

SCSS

$custom: #645a64;
$custom-light: #908890;
$custom-dark: #000000;

JSON

{
  "hex": "#645a64",
  "rgb": {
    "r": 100,
    "g": 90,
    "b": 100
  },
  "hsl": {
    "h": 300,
    "s": 5.263,
    "l": 37.255
  },
  "oklch": {
    "l": 0.4806,
    "c": 0.02016,
    "h": 325.9
  },
  "luminance": 0.10942
}

Semantic roles & 50–950 ramp

primary

#645A64

secondary

#899189

accent

#AE7979

background

#F8F8F8

surface

#F0EFF0

border

#CBCACB

text

#0C0B0C

muted

#7D7C7D

Preview Lab

Preview with #645A64

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

Preview Lab → · Contrast checker → · Palette generator →