#646F18#646F18

#646F18 is a mid, moderate yellow. Relative luminance 0.141; OKLCH L 51.6% C 0.108 H 116.7°. Best body text is #FFFFFF at 5.48:1 contrast (WCAG AA passes).

Color values

HEX	#646F18
RGB	rgb(100, 111, 24)
HSL	hsl(68, 64%, 26%)
HSV	hsv(68, 78%, 44%)
CMYK	cmyk(9.9%, 0%, 78.4%, 56.5%)
CIE-LAB	lab(44.44, -16.08, 43.74)
CIE-LCH	lch(44.44, 46.60, 110.18°)
OKLab	oklab(51.55% -0.0486 0.0964)
OKLCH	oklch(51.55% 0.108 116.7)
XYZ	xyz(11.1051, 14.1443, 3.0091)
Luminance	0.1414 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646F18 #23186F

analogous

#6F4F18 #646F18 #396F18

triadic

#646F18 #18646F #6F1864

tetradic

#646F18 #186F4F #23186F #6F1839

square

#646F18 #186F4F #23186F #6F1839

split-complementary

#646F18 #18396F #4F186F

monochromatic

#171905 #373D0D #646F18 #91A123 #BED22F

Accessibility & contrast

On white

5.48

#646F18 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.83

#646F18 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646F18

5.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646F18	#FFFFFF	#000000	##FFFFFF
##646F18	1.00	5.48	3.83	5.48
#FFFFFF	5.48	1.00	21.00	1.00
#000000	3.83	21.00	1.00	21.00
##FFFFFF	5.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#776905

Deuteranopia (green-blind)

#766A20

Tritanopia (blue-blind)

#6B685F

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #646f18;
/* rgb */ color: rgb(100, 111, 24);
/* oklch */ color: oklch(51.6% 0.108 116.7);

Tailwind

colors: {
  custom: {
    50: '#93985d',
    500: '#646f18',
    950: '#000000',
  },
}

SCSS

$custom: #646f18;
$custom-light: #93985d;
$custom-dark: #000000;

JSON

{
  "hex": "#646f18",
  "rgb": {
    "r": 100,
    "g": 111,
    "b": 24
  },
  "hsl": {
    "h": 67.586,
    "s": 64.444,
    "l": 26.471
  },
  "oklch": {
    "l": 0.51553,
    "c": 0.10796,
    "h": 116.7
  },
  "luminance": 0.14144
}

Semantic roles & 50–950 ramp

primary

#646F18

secondary

#4B3EA5

accent

#40E755

background

#F9F9F5

surface

#F2F2E9

border

#CCCCC5

text

#0D0D04

muted

#7E7E79

Preview Lab

Preview with #646F18

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

Preview Lab → · Contrast checker → · Palette generator →