#645A5E#645A5E

#645A5E is a mid, near-neutral grey. Relative luminance 0.108; OKLCH L 47.8% C 0.014 H 351.4°. Best body text is #FFFFFF at 6.63:1 contrast (WCAG AA passes).

Color values

HEX	#645A5E
RGB	rgb(100, 90, 94)
HSL	hsl(336, 5%, 37%)
HSV	hsv(336, 10%, 39%)
CMYK	cmyk(0%, 10%, 6%, 60.8%)
CIE-LAB	lab(39.29, 4.83, -0.83)
CIE-LCH	lch(39.29, 4.90, 350.27°)
OKLab	oklab(47.85% 0.0142 -0.0021)
OKLCH	oklch(47.85% 0.014 351.4)
XYZ	xyz(10.9318, 10.8300, 12.1020)
Luminance	0.1083 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645A5E #5A6460

analogous

#645A63 #645A5E #645B5A

triadic

#645A5E #5E645A #5A5E64

tetradic

#645A5E #63645A #5A6460 #5B5A64

square

#645A5E #63645A #5A6460 #5B5A64

split-complementary

#645A5E #5A645B #5A6364

monochromatic

#242021 #443D40 #645A5E #84777C #A1979B

Accessibility & contrast

On white

6.63

#645A5E on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.17

#645A5E on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645A5E

6.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645A5E	#FFFFFF	#000000	##FFFFFF
##645A5E	1.00	6.63	3.17	6.63
#FFFFFF	6.63	1.00	21.00	1.00
#000000	3.17	21.00	1.00	21.00
##FFFFFF	6.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5C5E

Deuteranopia (green-blind)

#5D5D5E

Tritanopia (blue-blind)

#665A5B

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #645a5e;
/* rgb */ color: rgb(100, 90, 94);
/* oklch */ color: oklch(47.8% 0.014 351.4);

Tailwind

colors: {
  custom: {
    50: '#90888b',
    500: '#645a5e',
    950: '#000000',
  },
}

SCSS

$custom: #645a5e;
$custom-light: #90888b;
$custom-dark: #000000;

JSON

{
  "hex": "#645a5e",
  "rgb": {
    "r": 100,
    "g": 90,
    "b": 94
  },
  "hsl": {
    "h": 336,
    "s": 5.263,
    "l": 37.255
  },
  "oklch": {
    "l": 0.47849,
    "c": 0.01431,
    "h": 351.4
  },
  "luminance": 0.1083
}

Semantic roles & 50–950 ramp

primary

#645A5E

secondary

#89918E

accent

#AE9979

background

#F8F8F8

surface

#F0EFF0

border

#CBCACB

text

#0C0B0C

muted

#7D7C7D

Preview Lab

Preview with #645A5E

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

Preview Lab → · Contrast checker → · Palette generator →