#646F71#646F71

#646F71 is a mid, near-neutral grey. Relative luminance 0.153; OKLCH L 53.3% C 0.014 H 209.8°. Best body text is #FFFFFF at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#646F71
RGB	rgb(100, 111, 113)
HSL	hsl(189, 6%, 42%)
HSV	hsv(189, 12%, 44%)
CMYK	cmyk(11.5%, 1.8%, 0%, 55.7%)
CIE-LAB	lab(46.00, -3.70, -2.53)
CIE-LCH	lch(46.00, 4.48, 214.35°)
OKLab	oklab(53.31% -0.0119 -0.0068)
OKLCH	oklch(53.31% 0.014 209.8)
XYZ	xyz(13.9199, 15.2702, 17.8337)
Luminance	0.1527 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646F71 #716664

analogous

#64716D #646F71 #646971

triadic

#646F71 #71646F #6F7164

tetradic

#646F71 #6D6471 #716664 #697164

square

#646F71 #6D6471 #716664 #697164

split-complementary

#646F71 #716469 #716D64

monochromatic

#2B2F30 #474F51 #646F71 #828E90 #A2ABAD

Accessibility & contrast

On white

5.18

#646F71 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.05

#646F71 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646F71

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646F71	#FFFFFF	#000000	##FFFFFF
##646F71	1.00	5.18	4.05	5.18
#FFFFFF	5.18	1.00	21.00	1.00
#000000	4.05	21.00	1.00	21.00
##FFFFFF	5.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D6E71

Deuteranopia (green-blind)

#6B6C71

Tritanopia (blue-blind)

#617070

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #646f71;
/* rgb */ color: rgb(100, 111, 113);
/* oklch */ color: oklch(53.3% 0.014 209.8);

Tailwind

colors: {
  custom: {
    50: '#909899',
    500: '#646f71',
    950: '#000000',
  },
}

SCSS

$custom: #646f71;
$custom-light: #909899;
$custom-dark: #000000;

JSON

{
  "hex": "#646f71",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 113
  },
  "hsl": {
    "h": 189.231,
    "s": 6.103,
    "l": 41.765
  },
  "oklch": {
    "l": 0.53309,
    "c": 0.01371,
    "h": 209.8
  },
  "luminance": 0.1527
}

Semantic roles & 50–950 ramp

primary

#646F71

secondary

#9D9594

accent

#8179AF

background

#F8F9F9

surface

#F0F2F2

border

#CBCCCC

text

#0C0D0E

muted

#7D7E7E

Preview Lab

Preview with #646F71

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

Preview Lab → · Contrast checker → · Palette generator →