#645C64#645C64

#645C64 is a mid, near-neutral grey. Relative luminance 0.113; OKLCH L 48.5% C 0.016 H 325.8°. Best body text is #FFFFFF at 6.45:1 contrast (WCAG AA passes).

Color values

HEX	#645C64
RGB	rgb(100, 92, 100)
HSL	hsl(300, 4%, 38%)
HSV	hsv(300, 8%, 39%)
CMYK	cmyk(0%, 8%, 0%, 60.8%)
CIE-LAB	lab(40.05, 4.84, -3.41)
CIE-LCH	lch(40.05, 5.92, 324.85°)
OKLab	oklab(48.51% 0.0133 -0.009)
OKLCH	oklch(48.51% 0.016 325.8)
XYZ	xyz(11.3826, 11.2838, 13.6325)
Luminance	0.1128 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645C64 #5C645C

analogous

#605C64 #645C64 #645C60

triadic

#645C64 #64645C #5C6464

tetradic

#645C64 #64605C #5C645C #5C6064

square

#645C64 #64605C #5C645C #5C6064

split-complementary

#645C64 #60645C #5C6460

monochromatic

#242124 #443F44 #645C64 #847984 #A199A1

Accessibility & contrast

On white

6.45

#645C64 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#645C64 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645C64

6.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645C64	#FFFFFF	#000000	##FFFFFF
##645C64	1.00	6.45	3.26	6.45
#FFFFFF	6.45	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C5E64

Deuteranopia (green-blind)

#5D5F64

Tritanopia (blue-blind)

#655D5F

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #645c64;
/* rgb */ color: rgb(100, 92, 100);
/* oklch */ color: oklch(48.5% 0.016 325.8);

Tailwind

colors: {
  custom: {
    50: '#908a90',
    500: '#645c64',
    950: '#000000',
  },
}

SCSS

$custom: #645c64;
$custom-light: #908a90;
$custom-dark: #000000;

JSON

{
  "hex": "#645c64",
  "rgb": {
    "r": 100,
    "g": 92,
    "b": 100
  },
  "hsl": {
    "h": 300,
    "s": 4.167,
    "l": 37.647
  },
  "oklch": {
    "l": 0.48506,
    "c": 0.01609,
    "h": 325.8
  },
  "luminance": 0.11284
}

Semantic roles & 50–950 ramp

primary

#645C64

secondary

#8B918B

accent

#AD7A7A

background

#F8F8F8

surface

#F0F0F0

border

#CBCBCB

text

#0C0B0C

muted

#7D7C7D

Preview Lab

Preview with #645C64

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

Preview Lab → · Contrast checker → · Palette generator →