#645D18#645D18

#645D18 is a mid, moderate yellow. Relative luminance 0.106; OKLCH L 47.1% C 0.088 H 103.4°. Best body text is #FFFFFF at 6.73:1 contrast (WCAG AA passes).

Color values

HEX	#645D18
RGB	rgb(100, 93, 24)
HSL	hsl(54, 61%, 24%)
HSV	hsv(54, 76%, 39%)
CMYK	cmyk(0%, 7%, 76%, 60.8%)
CIE-LAB	lab(38.91, -5.97, 38.44)
CIE-LCH	lch(38.91, 38.90, 98.83°)
OKLab	oklab(47.13% -0.0203 0.0852)
OKLCH	oklch(47.13% 0.088 103.4)
XYZ	xyz(9.3352, 10.6044, 2.4191)
Luminance	0.1060 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645D18 #181F64

analogous

#643718 #645D18 #456418

triadic

#645D18 #18645D #5D1864

tetradic

#645D18 #186437 #181F64 #641845

square

#645D18 #186437 #181F64 #641845

split-complementary

#645D18 #184564 #371864

monochromatic

#191706 #332F0C #645D18 #958B24 #C7B930

Accessibility & contrast

On white

6.73

#645D18 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#645D18 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645D18

6.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645D18	#FFFFFF	#000000	##FFFFFF
##645D18	1.00	6.73	3.12	6.73
#FFFFFF	6.73	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#665A0C

Deuteranopia (green-blind)

#685D1D

Tritanopia (blue-blind)

#6C564F

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #645d18;
/* rgb */ color: rgb(100, 93, 24);
/* oklch */ color: oklch(47.1% 0.088 103.4);

Tailwind

colors: {
  custom: {
    50: '#938a5a',
    500: '#645d18',
    950: '#000000',
  },
}

SCSS

$custom: #645d18;
$custom-light: #938a5a;
$custom-dark: #000000;

JSON

{
  "hex": "#645d18",
  "rgb": {
    "r": 100,
    "g": 93,
    "b": 24
  },
  "hsl": {
    "h": 54.474,
    "s": 61.29,
    "l": 24.314
  },
  "oklch": {
    "l": 0.47128,
    "c": 0.08763,
    "h": 103.4
  },
  "luminance": 0.10604
}

Semantic roles & 50–950 ramp

primary

#645D18

secondary

#3E469A

accent

#52E443

background

#F9F8F5

surface

#F2F0E9

border

#CCCBC5

text

#0D0B04

muted

#7E7C79

Preview Lab

Preview with #645D18

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

Preview Lab → · Contrast checker → · Palette generator →