#646E71#646E71

#646E71 is a mid, near-neutral grey. Relative luminance 0.151; OKLCH L 53.1% C 0.013 H 217.7°. Best body text is #FFFFFF at 5.24:1 contrast (WCAG AA passes).

Color values

HEX	#646E71
RGB	rgb(100, 110, 113)
HSL	hsl(194, 6%, 42%)
HSV	hsv(194, 12%, 44%)
CMYK	cmyk(11.5%, 2.7%, 0%, 55.7%)
CIE-LAB	lab(45.71, -3.11, -2.96)
CIE-LCH	lch(45.71, 4.30, 223.59°)
OKLab	oklab(53.08% -0.0103 -0.008)
OKLCH	oklch(53.08% 0.013 217.7)
XYZ	xyz(13.8114, 15.0532, 17.7975)
Luminance	0.1505 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646E71 #716764

analogous

#64716E #646E71 #646871

triadic

#646E71 #71646E #6E7164

tetradic

#646E71 #6E6471 #716764 #687164

square

#646E71 #6E6471 #716764 #687164

split-complementary

#646E71 #716468 #716E64

monochromatic

#2B2F30 #474E51 #646E71 #828D90 #A2ABAD

Accessibility & contrast

On white

5.24

#646E71 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.01

#646E71 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646E71

5.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646E71	#FFFFFF	#000000	##FFFFFF
##646E71	1.00	5.24	4.01	5.24
#FFFFFF	5.24	1.00	21.00	1.00
#000000	4.01	21.00	1.00	21.00
##FFFFFF	5.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C6D71

Deuteranopia (green-blind)

#6A6B71

Tritanopia (blue-blind)

#616F6F

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #646e71;
/* rgb */ color: rgb(100, 110, 113);
/* oklch */ color: oklch(53.1% 0.013 217.7);

Tailwind

colors: {
  custom: {
    50: '#909799',
    500: '#646e71',
    950: '#000000',
  },
}

SCSS

$custom: #646e71;
$custom-light: #909799;
$custom-dark: #000000;

JSON

{
  "hex": "#646e71",
  "rgb": {
    "r": 100,
    "g": 110,
    "b": 113
  },
  "hsl": {
    "h": 193.846,
    "s": 6.103,
    "l": 41.765
  },
  "oklch": {
    "l": 0.53076,
    "c": 0.01306,
    "h": 217.7
  },
  "luminance": 0.15053
}

Semantic roles & 50–950 ramp

primary

#646E71

secondary

#9D9694

accent

#8579AF

background

#F8F9F9

surface

#F0F2F2

border

#CBCCCC

text

#0C0D0E

muted

#7D7E7E

Preview Lab

Preview with #646E71

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

Preview Lab → · Contrast checker → · Palette generator →