#645A5C#645A5C

#645A5C is a mid, near-neutral grey. Relative luminance 0.108; OKLCH L 47.8% C 0.013 H 3.9°. Best body text is #FFFFFF at 6.65:1 contrast (WCAG AA passes).

Color values

HEX	#645A5C
RGB	rgb(100, 90, 92)
HSL	hsl(348, 5%, 37%)
HSV	hsv(348, 10%, 39%)
CMYK	cmyk(0%, 10%, 8%, 60.8%)
CIE-LAB	lab(39.23, 4.43, 0.32)
CIE-LCH	lch(39.23, 4.44, 4.12°)
OKLab	oklab(47.78% 0.0133 0.0009)
OKLCH	oklch(47.78% 0.013 3.9)
XYZ	xyz(10.8433, 10.7945, 11.6355)
Luminance	0.1079 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645A5C #5A6462

analogous

#645A61 #645A5C #645D5A

triadic

#645A5C #5C645A #5A5C64

tetradic

#645A5C #61645A #5A6462 #5D5A64

square

#645A5C #61645A #5A6462 #5D5A64

split-complementary

#645A5C #5A645D #5A6164

monochromatic

#242021 #443D3E #645A5C #84777A #A19799

Accessibility & contrast

On white

6.65

#645A5C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#645A5C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645A5C

6.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645A5C	#FFFFFF	#000000	##FFFFFF
##645A5C	1.00	6.65	3.16	6.65
#FFFFFF	6.65	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5B5C

Deuteranopia (green-blind)

#5D5D5C

Tritanopia (blue-blind)

#66595B

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #645a5c;
/* rgb */ color: rgb(100, 90, 92);
/* oklch */ color: oklch(47.8% 0.013 3.9);

Tailwind

colors: {
  custom: {
    50: '#90888a',
    500: '#645a5c',
    950: '#000000',
  },
}

SCSS

$custom: #645a5c;
$custom-light: #90888a;
$custom-dark: #000000;

JSON

{
  "hex": "#645a5c",
  "rgb": {
    "r": 100,
    "g": 90,
    "b": 92
  },
  "hsl": {
    "h": 348,
    "s": 5.263,
    "l": 37.255
  },
  "oklch": {
    "l": 0.47782,
    "c": 0.01331,
    "h": 3.9
  },
  "luminance": 0.10794
}

Semantic roles & 50–950 ramp

primary

#645A5C

secondary

#89918F

accent

#AEA479

background

#F8F8F8

surface

#F0EFF0

border

#CBCACB

text

#0C0B0B

muted

#7D7C7C

Preview Lab

Preview with #645A5C

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

Preview Lab → · Contrast checker → · Palette generator →