#666E64#666E64

#666E64 is a mid, near-neutral grey. Relative luminance 0.149; OKLCH L 52.8% C 0.018 H 139.4°. Best body text is #FFFFFF at 5.28:1 contrast (WCAG AA passes).

Color values

HEX	#666E64
RGB	rgb(102, 110, 100)
HSL	hsl(108, 5%, 41%)
HSV	hsv(108, 9%, 43%)
CMYK	cmyk(7.3%, 0%, 9.1%, 56.9%)
CIE-LAB	lab(45.49, -5.11, 4.54)
CIE-LCH	lch(45.49, 6.83, 138.42°)
OKLab	oklab(52.82% -0.0138 0.0118)
OKLCH	oklch(52.82% 0.018 139.4)
XYZ	xyz(13.3553, 14.8966, 14.2259)
Luminance	0.1490 (WCAG relative)
Temperature	neutral
Family	grey

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666E64 #6C646E

analogous

#6B6E64 #666E64 #646E67

triadic

#666E64 #64666E #6E6466

tetradic

#666E64 #646B6E #6C646E #6E6764

square

#666E64 #646B6E #6C646E #6E6764

split-complementary

#666E64 #67646E #6E646B

monochromatic

#2B2E2A #484E47 #666E64 #848D82 #A4AAA2

Accessibility & contrast

On white

5.28

#666E64 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.98

#666E64 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666E64

5.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666E64	#FFFFFF	#000000	##FFFFFF
##666E64	1.00	5.28	3.98	5.28
#FFFFFF	5.28	1.00	21.00	1.00
#000000	3.98	21.00	1.00	21.00
##FFFFFF	5.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6F6C63

Deuteranopia (green-blind)

#6D6B64

Tritanopia (blue-blind)

#666D6B

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #666e64;
/* rgb */ color: rgb(102, 110, 100);
/* oklch */ color: oklch(52.8% 0.018 139.4);

Tailwind

colors: {
  custom: {
    50: '#919790',
    500: '#666e64',
    950: '#000000',
  },
}

SCSS

$custom: #666e64;
$custom-light: #919790;
$custom-dark: #000000;

JSON

{
  "hex": "#666e64",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 100
  },
  "hsl": {
    "h": 108,
    "s": 4.762,
    "l": 41.176
  },
  "oklch": {
    "l": 0.52823,
    "c": 0.01819,
    "h": 139.4
  },
  "luminance": 0.14897
}

Semantic roles & 50–950 ramp

primary

#666E64

secondary

#99939A

accent

#7AAEA4

background

#F8F9F8

surface

#F0F2F0

border

#CBCCCB

text

#0C0D0C

muted

#7D7E7D

Preview Lab

Preview with #666E64

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

Preview Lab → · Contrast checker → · Palette generator →