#646B68#646B68

#646B68 is a mid, near-neutral grey. Relative luminance 0.142; OKLCH L 52.1% C 0.010 H 168.5°. Best body text is #FFFFFF at 5.46:1 contrast (WCAG AA passes).

Color values

HEX	#646B68
RGB	rgb(100, 107, 104)
HSL	hsl(154, 3%, 41%)
HSV	hsv(154, 7%, 42%)
CMYK	cmyk(6.5%, 0%, 2.8%, 58%)
CIE-LAB	lab(44.55, -3.31, 0.76)
CIE-LCH	lch(44.55, 3.40, 167.16°)
OKLab	oklab(52.08% -0.0096 0.002)
OKLCH	oklch(52.08% 0.01 168.5)
XYZ	xyz(13.0114, 14.2241, 15.1540)
Luminance	0.1422 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646B68 #6B6467

analogous

#646B64 #646B68 #646A6B

triadic

#646B68 #68646B #6B6864

tetradic

#646B68 #64646B #6B6467 #6A6B64

square

#646B68 #64646B #6B6467 #6A6B64

split-complementary

#646B68 #6B646A #6B6464

monochromatic

#292C2B #464B49 #646B68 #828A87 #A2A8A5

Accessibility & contrast

On white

5.46

#646B68 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.84

#646B68 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646B68

5.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646B68	#FFFFFF	#000000	##FFFFFF
##646B68	1.00	5.46	3.84	5.46
#FFFFFF	5.46	1.00	21.00	1.00
#000000	3.84	21.00	1.00	21.00
##FFFFFF	5.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B6A68

Deuteranopia (green-blind)

#696968

Tritanopia (blue-blind)

#636B6A

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #646b68;
/* rgb */ color: rgb(100, 107, 104);
/* oklch */ color: oklch(52.1% 0.010 168.5);

Tailwind

colors: {
  custom: {
    50: '#909593',
    500: '#646b68',
    950: '#000000',
  },
}

SCSS

$custom: #646b68;
$custom-light: #909593;
$custom-dark: #000000;

JSON

{
  "hex": "#646b68",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 104
  },
  "hsl": {
    "h": 154.286,
    "s": 3.382,
    "l": 40.588
  },
  "oklch": {
    "l": 0.52077,
    "c": 0.00976,
    "h": 168.5
  },
  "luminance": 0.14224
}

Semantic roles & 50–950 ramp

primary

#646B68

secondary

#989395

accent

#7B90AD

background

#F8F9F9

surface

#F0F1F1

border

#CBCBCB

text

#0C0D0D

muted

#7D7E7E

Preview Lab

Preview with #646B68

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

Preview Lab → · Contrast checker → · Palette generator →