#646B18#646B18

#646B18 is a mid, moderate yellow. Relative luminance 0.133; OKLCH L 50.6% C 0.103 H 114.4°. Best body text is #FFFFFF at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#646B18
RGB	rgb(100, 107, 24)
HSL	hsl(65, 63%, 26%)
HSV	hsv(65, 78%, 42%)
CMYK	cmyk(6.5%, 0%, 77.6%, 58%)
CIE-LAB	lab(43.20, -13.90, 42.57)
CIE-LCH	lch(43.20, 44.78, 108.09°)
OKLab	oklab(50.56% -0.0425 0.094)
OKLCH	oklch(50.56% 0.103 114.4)
XYZ	xyz(10.6784, 13.2909, 2.8668)
Luminance	0.1329 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646B18 #1F186B

analogous

#6B4818 #646B18 #3A6B18

triadic

#646B18 #18646B #6B1864

tetradic

#646B18 #186B48 #1F186B #6B183A

square

#646B18 #186B48 #1F186B #6B183A

split-complementary

#646B18 #183A6B #48186B

monochromatic

#171906 #35390D #646B18 #939D23 #C1CF2E

Accessibility & contrast

On white

5.74

#646B18 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#646B18 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646B18

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646B18	#FFFFFF	#000000	##FFFFFF
##646B18	1.00	5.74	3.66	5.74
#FFFFFF	5.74	1.00	21.00	1.00
#000000	3.66	21.00	1.00	21.00
##FFFFFF	5.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#736507

Deuteranopia (green-blind)

#73671F

Tritanopia (blue-blind)

#6B645B

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #646b18;
/* rgb */ color: rgb(100, 107, 24);
/* oklch */ color: oklch(50.6% 0.103 114.4);

Tailwind

colors: {
  custom: {
    50: '#93955c',
    500: '#646b18',
    950: '#000000',
  },
}

SCSS

$custom: #646b18;
$custom-light: #93955c;
$custom-dark: #000000;

JSON

{
  "hex": "#646b18",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 24
  },
  "hsl": {
    "h": 65.06,
    "s": 63.359,
    "l": 25.686
  },
  "oklch": {
    "l": 0.50557,
    "c": 0.10313,
    "h": 114.4
  },
  "luminance": 0.13291
}

Semantic roles & 50–950 ramp

primary

#646B18

secondary

#463EA1

accent

#41E64F

background

#F9F9F5

surface

#F2F1E9

border

#CCCBC5

text

#0D0D04

muted

#7E7E79

Preview Lab

Preview with #646B18

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

Preview Lab → · Contrast checker → · Palette generator →