#646B2B#646B2B

#646B2B is a mid, moderate yellow. Relative luminance 0.134; OKLCH L 50.7% C 0.088 H 114.8°. Best body text is #FFFFFF at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#646B2B
RGB	rgb(100, 107, 43)
HSL	hsl(67, 43%, 29%)
HSV	hsv(67, 60%, 42%)
CMYK	cmyk(6.5%, 0%, 59.8%, 58%)
CIE-LAB	lab(43.36, -12.57, 34.26)
CIE-LCH	lch(43.36, 36.50, 110.14°)
OKLab	oklab(50.74% -0.0367 0.0795)
OKLCH	oklch(50.74% 0.088 114.8)
XYZ	xyz(10.9495, 13.3993, 4.2945)
Luminance	0.1340 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646B2B #322B6B

analogous

#6B522B #646B2B #446B2B

triadic

#646B2B #2B646B #6B2B64

tetradic

#646B2B #2B6B52 #322B6B #6B2B44

square

#646B2B #2B6B52 #322B6B #6B2B44

split-complementary

#646B2B #2B446B #522B6B

monochromatic

#141609 #3B3F19 #646B2B #8D973D #B0BB56

Accessibility & contrast

On white

5.71

#646B2B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#646B2B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646B2B

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646B2B	#FFFFFF	#000000	##FFFFFF
##646B2B	1.00	5.71	3.68	5.71
#FFFFFF	5.71	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#726624

Deuteranopia (green-blind)

#72672F

Tritanopia (blue-blind)

#6A655D

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #646b2b;
/* rgb */ color: rgb(100, 107, 43);
/* oklch */ color: oklch(50.7% 0.088 114.8);

Tailwind

colors: {
  custom: {
    50: '#929567',
    500: '#646b2b',
    950: '#000000',
  },
}

SCSS

$custom: #646b2b;
$custom-light: #929567;
$custom-dark: #000000;

JSON

{
  "hex": "#646b2b",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 43
  },
  "hsl": {
    "h": 66.563,
    "s": 42.667,
    "l": 29.412
  },
  "oklch": {
    "l": 0.50737,
    "c": 0.08759,
    "h": 114.8
  },
  "luminance": 0.13399
}

Semantic roles & 50–950 ramp

primary

#646B2B

secondary

#5D559D

accent

#55D263

background

#F9F9F6

surface

#F1F1EB

border

#CBCBC6

text

#0D0D06

muted

#7E7E7A

Preview Lab

Preview with #646B2B

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

Preview Lab → · Contrast checker → · Palette generator →