#645C18#645C18

#645C18 is a mid, moderate yellow. Relative luminance 0.104; OKLCH L 46.9% C 0.087 H 102.5°. Best body text is #FFFFFF at 6.80:1 contrast (WCAG AA passes).

Color values

HEX	#645C18
RGB	rgb(100, 92, 24)
HSL	hsl(54, 61%, 24%)
HSV	hsv(54, 76%, 39%)
CMYK	cmyk(0%, 8%, 76%, 60.8%)
CIE-LAB	lab(38.60, -5.39, 38.15)
CIE-LCH	lch(38.60, 38.52, 98.04°)
OKLab	oklab(46.89% -0.0187 0.0846)
OKLCH	oklch(46.89% 0.087 102.5)
XYZ	xyz(9.2480, 10.4300, 2.3900)
Luminance	0.1043 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645C18 #182064

analogous

#643618 #645C18 #466418

triadic

#645C18 #18645C #5C1864

tetradic

#645C18 #186436 #182064 #641846

square

#645C18 #186436 #182064 #641846

split-complementary

#645C18 #184664 #361864

monochromatic

#191706 #332F0C #645C18 #958924 #C7B730

Accessibility & contrast

On white

6.80

#645C18 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.09

#645C18 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645C18

6.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645C18	#FFFFFF	#000000	##FFFFFF
##645C18	1.00	6.80	3.09	6.80
#FFFFFF	6.80	1.00	21.00	1.00
#000000	3.09	21.00	1.00	21.00
##FFFFFF	6.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#65590D

Deuteranopia (green-blind)

#675C1C

Tritanopia (blue-blind)

#6C554F

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #645c18;
/* rgb */ color: rgb(100, 92, 24);
/* oklch */ color: oklch(46.9% 0.087 102.5);

Tailwind

colors: {
  custom: {
    50: '#93895a',
    500: '#645c18',
    950: '#000000',
  },
}

SCSS

$custom: #645c18;
$custom-light: #93895a;
$custom-dark: #000000;

JSON

{
  "hex": "#645c18",
  "rgb": {
    "r": 100,
    "g": 92,
    "b": 24
  },
  "hsl": {
    "h": 53.684,
    "s": 61.29,
    "l": 24.314
  },
  "oklch": {
    "l": 0.46888,
    "c": 0.08664,
    "h": 102.5
  },
  "luminance": 0.1043
}

Semantic roles & 50–950 ramp

primary

#645C18

secondary

#3E479A

accent

#54E443

background

#F9F8F5

surface

#F2F0E9

border

#CCCBC5

text

#0D0B04

muted

#7E7C79

Preview Lab

Preview with #645C18

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

Preview Lab → · Contrast checker → · Palette generator →