#646D18#646D18

#646D18 is a mid, moderate yellow. Relative luminance 0.137; OKLCH L 51.1% C 0.106 H 115.6°. Best body text is #FFFFFF at 5.61:1 contrast (WCAG AA passes).

Color values

HEX	#646D18
RGB	rgb(100, 109, 24)
HSL	hsl(66, 64%, 26%)
HSV	hsv(66, 78%, 43%)
CMYK	cmyk(8.3%, 0%, 78%, 57.3%)
CIE-LAB	lab(43.82, -14.99, 43.15)
CIE-LCH	lch(43.82, 45.68, 109.16°)
OKLab	oklab(51.05% -0.0456 0.0952)
OKLCH	oklch(51.05% 0.106 115.6)
XYZ	xyz(10.8893, 13.7127, 2.9372)
Luminance	0.1371 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646D18 #21186D

analogous

#6D4B18 #646D18 #396D18

triadic

#646D18 #18646D #6D1864

tetradic

#646D18 #186D4B #21186D #6D1839

square

#646D18 #186D4B #21186D #6D1839

split-complementary

#646D18 #18396D #4B186D

monochromatic

#171906 #363B0D #646D18 #929F23 #C0D12E

Accessibility & contrast

On white

5.61

#646D18 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.74

#646D18 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646D18

5.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646D18	#FFFFFF	#000000	##FFFFFF
##646D18	1.00	5.61	3.74	5.61
#FFFFFF	5.61	1.00	21.00	1.00
#000000	3.74	21.00	1.00	21.00
##FFFFFF	5.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#756706

Deuteranopia (green-blind)

#75681F

Tritanopia (blue-blind)

#6B665D

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #646d18;
/* rgb */ color: rgb(100, 109, 24);
/* oklch */ color: oklch(51.1% 0.106 115.6);

Tailwind

colors: {
  custom: {
    50: '#93965c',
    500: '#646d18',
    950: '#000000',
  },
}

SCSS

$custom: #646d18;
$custom-light: #93965c;
$custom-dark: #000000;

JSON

{
  "hex": "#646d18",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 24
  },
  "hsl": {
    "h": 66.353,
    "s": 63.91,
    "l": 26.078
  },
  "oklch": {
    "l": 0.51054,
    "c": 0.10554,
    "h": 115.6
  },
  "luminance": 0.13713
}

Semantic roles & 50–950 ramp

primary

#646D18

secondary

#493EA3

accent

#41E752

background

#F9F9F5

surface

#F2F2E9

border

#CCCCC5

text

#0D0D04

muted

#7E7E79

Preview Lab

Preview with #646D18

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

Preview Lab → · Contrast checker → · Palette generator →