#646D21#646D21

#646D21 is a mid, moderate yellow. Relative luminance 0.138; OKLCH L 51.1% C 0.099 H 115.8°. Best body text is #FFFFFF at 5.60:1 contrast (WCAG AA passes).

Color values

HEX	#646D21
RGB	rgb(100, 109, 33)
HSL	hsl(67, 54%, 28%)
HSV	hsv(67, 70%, 43%)
CMYK	cmyk(8.3%, 0%, 69.7%, 57.3%)
CIE-LAB	lab(43.88, -14.46, 39.57)
CIE-LCH	lch(43.88, 42.12, 110.07°)
OKLab	oklab(51.13% -0.0431 0.0893)
OKLCH	oklch(51.13% 0.099 115.8)
XYZ	xyz(10.9989, 13.7566, 3.5144)
Luminance	0.1376 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646D21 #2A216D

analogous

#6D5021 #646D21 #3E6D21

triadic

#646D21 #21646D #6D2164

tetradic

#646D21 #216D50 #2A216D #6D213E

square

#646D21 #216D50 #2A216D #6D213E

split-complementary

#646D21 #213E6D #50216D

monochromatic

#161707 #393E13 #646D21 #8F9C2F #B6C642

Accessibility & contrast

On white

5.60

#646D21 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.75

#646D21 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646D21

5.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646D21	#FFFFFF	#000000	##FFFFFF
##646D21	1.00	5.60	3.75	5.60
#FFFFFF	5.60	1.00	21.00	1.00
#000000	3.75	21.00	1.00	21.00
##FFFFFF	5.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#756716

Deuteranopia (green-blind)

#746826

Tritanopia (blue-blind)

#6A675E

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #646d21;
/* rgb */ color: rgb(100, 109, 33);
/* oklch */ color: oklch(51.1% 0.099 115.8);

Tailwind

colors: {
  custom: {
    50: '#929661',
    500: '#646d21',
    950: '#000000',
  },
}

SCSS

$custom: #646d21;
$custom-light: #929661;
$custom-dark: #000000;

JSON

{
  "hex": "#646d21",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 33
  },
  "hsl": {
    "h": 67.105,
    "s": 53.521,
    "l": 27.843
  },
  "oklch": {
    "l": 0.51125,
    "c": 0.09915,
    "h": 115.8
  },
  "luminance": 0.13756
}

Semantic roles & 50–950 ramp

primary

#646D21

secondary

#5349A1

accent

#4BDD5C

background

#F9F9F5

surface

#F1F2EA

border

#CBCCC6

text

#0D0D05

muted

#7E7E79

Preview Lab

Preview with #646D21

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

Preview Lab → · Contrast checker → · Palette generator →