#664B4E#664B4E

#664B4E is a dark, muted red. Relative luminance 0.084; OKLCH L 44.3% C 0.037 H 11.3°. Best body text is #FFFFFF at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#664B4E
RGB	rgb(102, 75, 78)
HSL	hsl(353, 15%, 35%)
HSV	hsv(353, 26%, 40%)
CMYK	cmyk(0%, 26.5%, 23.5%, 60%)
CIE-LAB	lab(34.82, 11.94, 2.69)
CIE-LCH	lch(34.82, 12.24, 12.71°)
OKLab	oklab(44.26% 0.0363 0.0072)
OKLCH	oklch(44.26% 0.037 11.3)
XYZ	xyz(9.3708, 8.4074, 8.3355)
Luminance	0.0841 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#664B4E #4B6663

analogous

#664B5C #664B4E #66564B

triadic

#664B4E #4E664B #4B4E66

tetradic

#664B4E #5C664B #4B6663 #564B66

square

#664B4E #5C664B #4B6663 #564B66

split-complementary

#664B4E #4B6656 #4B5C66

monochromatic

#1F1718 #433133 #664B4E #896569 #A68689

Accessibility & contrast

On white

7.83

#664B4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#664B4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #664B4E

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##664B4E	#FFFFFF	#000000	##FFFFFF
##664B4E	1.00	7.83	2.68	7.83
#FFFFFF	7.83	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F4F4E

Deuteranopia (green-blind)

#56544E

Tritanopia (blue-blind)

#6B494C

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #664b4e;
/* rgb */ color: rgb(102, 75, 78);
/* oklch */ color: oklch(44.3% 0.037 11.3);

Tailwind

colors: {
  custom: {
    50: '#927d7f',
    500: '#664b4e',
    950: '#000000',
  },
}

SCSS

$custom: #664b4e;
$custom-light: #927d7f;
$custom-dark: #000000;

JSON

{
  "hex": "#664b4e",
  "rgb": {
    "r": 102,
    "g": 75,
    "b": 78
  },
  "hsl": {
    "h": 353.333,
    "s": 15.254,
    "l": 34.706
  },
  "oklch": {
    "l": 0.44264,
    "c": 0.03696,
    "h": 11.3
  },
  "luminance": 0.08407
}

Semantic roles & 50–950 ramp

primary

#664B4E

secondary

#7A9390

accent

#B8B070

background

#F9F7F7

surface

#F1EEEE

border

#CBC9C9

text

#0D090A

muted

#7E7B7C

Preview Lab

Preview with #664B4E

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

Preview Lab → · Contrast checker → · Palette generator →