#646C72#646C72

#646C72 is a mid, near-neutral grey. Relative luminance 0.146; OKLCH L 52.6% C 0.014 H 240.1°. Best body text is #FFFFFF at 5.34:1 contrast (WCAG AA passes).

Color values

HEX	#646C72
RGB	rgb(100, 108, 114)
HSL	hsl(206, 7%, 42%)
HSV	hsv(206, 12%, 45%)
CMYK	cmyk(12.3%, 5.3%, 0%, 55.3%)
CIE-LAB	lab(45.15, -1.71, -4.38)
CIE-LCH	lch(45.15, 4.71, 248.73°)
OKLab	oklab(52.65% -0.0068 -0.0118)
OKLCH	oklch(52.65% 0.014 240.1)
XYZ	xyz(13.6547, 14.6491, 18.0245)
Luminance	0.1465 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646C72 #726A64

analogous

#647271 #646C72 #646572

triadic

#646C72 #72646C #6C7264

tetradic

#646C72 #716472 #726A64 #657264

square

#646C72 #716472 #726A64 #657264

split-complementary

#646C72 #726465 #727164

monochromatic

#2B2E31 #474D51 #646C72 #828B91 #A3A9AE

Accessibility & contrast

On white

5.34

#646C72 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.93

#646C72 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646C72

5.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646C72	#FFFFFF	#000000	##FFFFFF
##646C72	1.00	5.34	3.93	5.34
#FFFFFF	5.34	1.00	21.00	1.00
#000000	3.93	21.00	1.00	21.00
##FFFFFF	5.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A6C72

Deuteranopia (green-blind)

#686A72

Tritanopia (blue-blind)

#616E6E

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #646c72;
/* rgb */ color: rgb(100, 108, 114);
/* oklch */ color: oklch(52.6% 0.014 240.1);

Tailwind

colors: {
  custom: {
    50: '#90969a',
    500: '#646c72',
    950: '#000000',
  },
}

SCSS

$custom: #646c72;
$custom-light: #90969a;
$custom-dark: #000000;

JSON

{
  "hex": "#646c72",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 114
  },
  "hsl": {
    "h": 205.714,
    "s": 6.542,
    "l": 41.961
  },
  "oklch": {
    "l": 0.52648,
    "c": 0.01361,
    "h": 240.1
  },
  "luminance": 0.14649
}

Semantic roles & 50–950 ramp

primary

#646C72

secondary

#9E9894

accent

#9078B0

background

#F8F9F9

surface

#F0F1F2

border

#CBCBCC

text

#0C0D0E

muted

#7D7E7E

Preview Lab

Preview with #646C72

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

Preview Lab → · Contrast checker → · Palette generator →