#646B28#646B28

#646B28 is a mid, moderate yellow. Relative luminance 0.134; OKLCH L 50.7% C 0.090 H 114.7°. Best body text is #FFFFFF at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#646B28
RGB	rgb(100, 107, 40)
HSL	hsl(66, 46%, 29%)
HSV	hsv(66, 63%, 42%)
CMYK	cmyk(6.5%, 0%, 62.6%, 58%)
CIE-LAB	lab(43.33, -12.83, 35.72)
CIE-LCH	lch(43.33, 37.95, 109.75°)
OKLab	oklab(50.7% -0.0378 0.0822)
OKLCH	oklch(50.7% 0.09 114.7)
XYZ	xyz(10.8965, 13.3781, 4.0153)
Luminance	0.1338 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646B28 #2F286B

analogous

#6B5128 #646B28 #436B28

triadic

#646B28 #28646B #6B2864

tetradic

#646B28 #286B51 #2F286B #6B2843

square

#646B28 #286B51 #2F286B #6B2843

split-complementary

#646B28 #28436B #51286B

monochromatic

#151608 #3A3E17 #646B28 #8E9839 #B2BE50

Accessibility & contrast

On white

5.71

#646B28 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#646B28 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646B28

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646B28	#FFFFFF	#000000	##FFFFFF
##646B28	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)

#726620

Deuteranopia (green-blind)

#72672C

Tritanopia (blue-blind)

#6A655D

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #646b28;
/* rgb */ color: rgb(100, 107, 40);
/* oklch */ color: oklch(50.7% 0.090 114.7);

Tailwind

colors: {
  custom: {
    50: '#929565',
    500: '#646b28',
    950: '#000000',
  },
}

SCSS

$custom: #646b28;
$custom-light: #929565;
$custom-dark: #000000;

JSON

{
  "hex": "#646b28",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 40
  },
  "hsl": {
    "h": 66.269,
    "s": 45.578,
    "l": 28.824
  },
  "oklch": {
    "l": 0.50701,
    "c": 0.09049,
    "h": 114.7
  },
  "luminance": 0.13378
}

Semantic roles & 50–950 ramp

primary

#646B28

secondary

#59519D

accent

#53D560

background

#F9F9F6

surface

#F1F1EB

border

#CBCBC6

text

#0D0D06

muted

#7E7E7A

Preview Lab

Preview with #646B28

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

Preview Lab → · Contrast checker → · Palette generator →