#646B37#646B37

#646B37 is a mid, moderate yellow. Relative luminance 0.135; OKLCH L 50.9% C 0.075 H 115.4°. Best body text is #FFFFFF at 5.68:1 contrast (WCAG AA passes).

Color values

HEX	#646B37
RGB	rgb(100, 107, 55)
HSL	hsl(68, 32%, 32%)
HSV	hsv(68, 49%, 42%)
CMYK	cmyk(6.5%, 0%, 48.6%, 58%)
CIE-LAB	lab(43.51, -11.35, 28.09)
CIE-LCH	lch(43.51, 30.30, 112.00°)
OKLab	oklab(50.9% -0.032 0.0673)
OKLCH	oklch(50.9% 0.075 115.4)
XYZ	xyz(11.2029, 13.5007, 5.6294)
Luminance	0.1350 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646B37 #3E376B

analogous

#6B5837 #646B37 #4A6B37

triadic

#646B37 #37646B #6B3764

tetradic

#646B37 #376B58 #3E376B #6B374A

square

#646B37 #376B58 #3E376B #6B374A

split-complementary

#646B37 #374A6B #58376B

monochromatic

#181A0D #3E4322 #646B37 #8A934C #A9B26A

Accessibility & contrast

On white

5.68

#646B37 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.70

#646B37 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646B37

5.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646B37	#FFFFFF	#000000	##FFFFFF
##646B37	1.00	5.68	3.70	5.68
#FFFFFF	5.68	1.00	21.00	1.00
#000000	3.70	21.00	1.00	21.00
##FFFFFF	5.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#716633

Deuteranopia (green-blind)

#71673A

Tritanopia (blue-blind)

#69665F

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #646b37;
/* rgb */ color: rgb(100, 107, 55);
/* oklch */ color: oklch(50.9% 0.075 115.4);

Tailwind

colors: {
  custom: {
    50: '#91956f',
    500: '#646b37',
    950: '#000000',
  },
}

SCSS

$custom: #646b37;
$custom-light: #91956f;
$custom-dark: #000000;

JSON

{
  "hex": "#646b37",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 55
  },
  "hsl": {
    "h": 68.077,
    "s": 32.099,
    "l": 31.765
  },
  "oklch": {
    "l": 0.50904,
    "c": 0.07453,
    "h": 115.4
  },
  "luminance": 0.13501
}

Semantic roles & 50–950 ramp

primary

#646B37

secondary

#6A629B

accent

#60C86E

background

#F9F9F6

surface

#F1F1EC

border

#CBCBC7

text

#0D0D07

muted

#7E7E7A

Preview Lab

Preview with #646B37

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

Preview Lab → · Contrast checker → · Palette generator →