#645E6E#645E6E

#645E6E is a mid, muted grey. Relative luminance 0.118; OKLCH L 49.3% C 0.026 H 302.5°. Best body text is #FFFFFF at 6.23:1 contrast (WCAG AA passes).

Color values

HEX	#645E6E
RGB	rgb(100, 94, 110)
HSL	hsl(263, 8%, 40%)
HSV	hsv(263, 15%, 43%)
CMYK	cmyk(9.1%, 14.5%, 0%, 56.9%)
CIE-LAB	lab(40.96, 5.81, -8.20)
CIE-LCH	lch(40.96, 10.05, 305.33°)
OKLab	oklab(49.32% 0.0141 -0.0221)
OKLCH	oklch(49.32% 0.026 302.5)
XYZ	xyz(12.0722, 11.8405, 16.3983)
Luminance	0.1184 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645E6E #686E5E

analogous

#5E606E #645E6E #6C5E6E

triadic

#645E6E #6E645E #5E6E64

tetradic

#645E6E #6E5E60 #686E5E #5E6E6C

square

#645E6E #6E5E60 #686E5E #5E6E6C

split-complementary

#645E6E #6E6C5E #606E5E

monochromatic

#28262C #46424D #645E6E #827B8E #A19CAA

Accessibility & contrast

On white

6.23

#645E6E on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.37

#645E6E on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645E6E

6.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645E6E	#FFFFFF	#000000	##FFFFFF
##645E6E	1.00	6.23	3.37	6.23
#FFFFFF	6.23	1.00	21.00	1.00
#000000	3.37	21.00	1.00	21.00
##FFFFFF	6.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B606F

Deuteranopia (green-blind)

#5C616D

Tritanopia (blue-blind)

#636063

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #645e6e;
/* rgb */ color: rgb(100, 94, 110);
/* oklch */ color: oklch(49.3% 0.026 302.5);

Tailwind

colors: {
  custom: {
    50: '#908b97',
    500: '#645e6e',
    950: '#000000',
  },
}

SCSS

$custom: #645e6e;
$custom-light: #908b97;
$custom-dark: #000000;

JSON

{
  "hex": "#645e6e",
  "rgb": {
    "r": 100,
    "g": 94,
    "b": 110
  },
  "hsl": {
    "h": 262.5,
    "s": 7.843,
    "l": 40
  },
  "oklch": {
    "l": 0.49324,
    "c": 0.02618,
    "h": 302.5
  },
  "luminance": 0.11841
}

Semantic roles & 50–950 ramp

primary

#645E6E

secondary

#959A8E

accent

#B1779B

background

#F8F8F9

surface

#F0F0F2

border

#CBCBCC

text

#0C0C0D

muted

#7D7D7E

Preview Lab

Preview with #645E6E

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

Preview Lab → · Contrast checker → · Palette generator →