#646C68#646C68

#646C68 is a mid, near-neutral grey. Relative luminance 0.144; OKLCH L 52.3% C 0.012 H 164.6°. Best body text is #FFFFFF at 5.40:1 contrast (WCAG AA passes).

Color values

HEX	#646C68
RGB	rgb(100, 108, 104)
HSL	hsl(150, 4%, 41%)
HSV	hsv(150, 7%, 42%)
CMYK	cmyk(7.4%, 0%, 3.7%, 57.6%)
CIE-LAB	lab(44.85, -3.90, 1.19)
CIE-LCH	lch(44.85, 4.07, 163.08°)
OKLab	oklab(52.31% -0.0111 0.0031)
OKLCH	oklch(52.31% 0.012 164.6)
XYZ	xyz(13.1163, 14.4338, 15.1890)
Luminance	0.1443 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646C68 #6C6468

analogous

#646C64 #646C68 #646C6C

triadic

#646C68 #68646C #6C6864

tetradic

#646C68 #64646C #6C6468 #6C6C64

square

#646C68 #64646C #6C6468 #6C6C64

split-complementary

#646C68 #6C646C #6C6464

monochromatic

#292C2B #474C49 #646C68 #828B87 #A2A9A5

Accessibility & contrast

On white

5.40

#646C68 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.89

#646C68 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646C68

5.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646C68	#FFFFFF	#000000	##FFFFFF
##646C68	1.00	5.40	3.89	5.40
#FFFFFF	5.40	1.00	21.00	1.00
#000000	3.89	21.00	1.00	21.00
##FFFFFF	5.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C6B68

Deuteranopia (green-blind)

#6A6A68

Tritanopia (blue-blind)

#636C6B

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #646c68;
/* rgb */ color: rgb(100, 108, 104);
/* oklch */ color: oklch(52.3% 0.012 164.6);

Tailwind

colors: {
  custom: {
    50: '#909693',
    500: '#646c68',
    950: '#000000',
  },
}

SCSS

$custom: #646c68;
$custom-light: #909693;
$custom-dark: #000000;

JSON

{
  "hex": "#646c68",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 104
  },
  "hsl": {
    "h": 150,
    "s": 3.846,
    "l": 40.784
  },
  "oklch": {
    "l": 0.52311,
    "c": 0.01157,
    "h": 164.6
  },
  "luminance": 0.14434
}

Semantic roles & 50–950 ramp

primary

#646C68

secondary

#999396

accent

#7B94AD

background

#F8F9F9

surface

#F0F1F1

border

#CBCBCB

text

#0C0D0D

muted

#7D7E7E

Preview Lab

Preview with #646C68

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

Preview Lab → · Contrast checker → · Palette generator →