#646166#646166

#646166 is a mid, near-neutral grey. Relative luminance 0.122; OKLCH L 49.7% C 0.009 H 312.2°. Best body text is #FFFFFF at 6.10:1 contrast (WCAG AA passes).

Color values

HEX	#646166
RGB	rgb(100, 97, 102)
HSL	hsl(276, 3%, 39%)
HSV	hsv(276, 5%, 40%)
CMYK	cmyk(2%, 4.9%, 0%, 60%)
CIE-LAB	lab(41.56, 2.23, -2.41)
CIE-LCH	lch(41.56, 3.28, 312.67°)
OKLab	oklab(49.7% 0.0058 -0.0064)
OKLCH	oklch(49.7% 0.009 312.2)
XYZ	xyz(11.9281, 12.2180, 14.2977)
Luminance	0.1222 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646166 #636661

analogous

#626166 #646166 #666166

triadic

#646166 #666461 #616664

tetradic

#646166 #666261 #636661 #616666

square

#646166 #666261 #636661 #616666

split-complementary

#646166 #666661 #616662

monochromatic

#262527 #454347 #646166 #837F85 #A19EA3

Accessibility & contrast

On white

6.10

#646166 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.44

#646166 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646166

6.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646166	#FFFFFF	#000000	##FFFFFF
##646166	1.00	6.10	3.44	6.10
#FFFFFF	6.10	1.00	21.00	1.00
#000000	3.44	21.00	1.00	21.00
##FFFFFF	6.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#606266

Deuteranopia (green-blind)

#616266

Tritanopia (blue-blind)

#646263

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #646166;
/* rgb */ color: rgb(100, 97, 102);
/* oklch */ color: oklch(49.7% 0.009 312.2);

Tailwind

colors: {
  custom: {
    50: '#908d91',
    500: '#646166',
    950: '#000000',
  },
}

SCSS

$custom: #646166;
$custom-light: #908d91;
$custom-dark: #000000;

JSON

{
  "hex": "#646166",
  "rgb": {
    "r": 100,
    "g": 97,
    "b": 102
  },
  "hsl": {
    "h": 276,
    "s": 2.513,
    "l": 39.02
  },
  "oklch": {
    "l": 0.49704,
    "c": 0.00866,
    "h": 312.2
  },
  "luminance": 0.12218
}

Semantic roles & 50–950 ramp

primary

#646166

secondary

#91938F

accent

#AC7C8F

background

#F8F8F8

surface

#F0F0F0

border

#CBCBCB

text

#0C0C0C

muted

#7D7D7D

Preview Lab

Preview with #646166

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

Preview Lab → · Contrast checker → · Palette generator →