#645C68#645C68

#645C68 is a mid, muted grey. Relative luminance 0.114; OKLCH L 48.7% C 0.021 H 314.6°. Best body text is #FFFFFF at 6.42:1 contrast (WCAG AA passes).

Color values

HEX	#645C68
RGB	rgb(100, 92, 104)
HSL	hsl(280, 6%, 38%)
HSV	hsv(280, 12%, 41%)
CMYK	cmyk(3.8%, 11.5%, 0%, 59.2%)
CIE-LAB	lab(40.19, 5.70, -5.68)
CIE-LCH	lch(40.19, 8.04, 315.12°)
OKLab	oklab(48.65% 0.015 -0.0152)
OKLCH	oklch(48.65% 0.021 314.6)
XYZ	xyz(11.5810, 11.3632, 14.6772)
Luminance	0.1136 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645C68 #60685C

analogous

#5E5C68 #645C68 #685C66

triadic

#645C68 #68645C #5C6864

tetradic

#645C68 #685E5C #60685C #5C6668

square

#645C68 #685E5C #60685C #5C6668

split-complementary

#645C68 #66685C #5C685E

monochromatic

#262327 #453F48 #645C68 #837988 #A199A5

Accessibility & contrast

On white

6.42

#645C68 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#645C68 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645C68

6.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645C68	#FFFFFF	#000000	##FFFFFF
##645C68	1.00	6.42	3.27	6.42
#FFFFFF	6.42	1.00	21.00	1.00
#000000	3.27	21.00	1.00	21.00
##FFFFFF	6.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B5E69

Deuteranopia (green-blind)

#5C5F68

Tritanopia (blue-blind)

#645D60

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #645c68;
/* rgb */ color: rgb(100, 92, 104);
/* oklch */ color: oklch(48.7% 0.021 314.6);

Tailwind

colors: {
  custom: {
    50: '#908a93',
    500: '#645c68',
    950: '#000000',
  },
}

SCSS

$custom: #645c68;
$custom-light: #908a93;
$custom-dark: #000000;

JSON

{
  "hex": "#645c68",
  "rgb": {
    "r": 100,
    "g": 92,
    "b": 104
  },
  "hsl": {
    "h": 280,
    "s": 6.122,
    "l": 38.431
  },
  "oklch": {
    "l": 0.48651,
    "c": 0.02131,
    "h": 314.6
  },
  "luminance": 0.11363
}

Semantic roles & 50–950 ramp

primary

#645C68

secondary

#8E958B

accent

#AF798B

background

#F8F8F9

surface

#F0F0F1

border

#CBCBCB

text

#0C0B0D

muted

#7D7C7E

Preview Lab

Preview with #645C68

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

Preview Lab → · Contrast checker → · Palette generator →