#645C38#645C38

#645C38 is a mid, muted yellow. Relative luminance 0.106; OKLCH L 47.3% C 0.054 H 97.2°. Best body text is #FFFFFF at 6.71:1 contrast (WCAG AA passes).

Color values

HEX	#645C38
RGB	rgb(100, 92, 56)
HSL	hsl(49, 28%, 31%)
HSV	hsv(49, 44%, 39%)
CMYK	cmyk(0%, 8%, 44%, 60.8%)
CIE-LAB	lab(38.98, -2.57, 21.87)
CIE-LCH	lch(38.98, 22.02, 96.69°)
OKLab	oklab(47.31% -0.0067 0.0534)
OKLCH	oklch(47.31% 0.054 97.2)
XYZ	xyz(9.7967, 10.6495, 5.2801)
Luminance	0.1065 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645C38 #384064

analogous

#644638 #645C38 #566438

triadic

#645C38 #38645C #5C3864

tetradic

#645C38 #386446 #384064 #643856

square

#645C38 #386446 #384064 #643856

split-complementary

#645C38 #385664 #463864

monochromatic

#16140C #3D3822 #645C38 #8B804E #ACA06B

Accessibility & contrast

On white

6.71

#645C38 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.13

#645C38 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645C38

6.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645C38	#FFFFFF	#000000	##FFFFFF
##645C38	1.00	6.71	3.13	6.71
#FFFFFF	6.71	1.00	21.00	1.00
#000000	3.13	21.00	1.00	21.00
##FFFFFF	6.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#635A35

Deuteranopia (green-blind)

#655D39

Tritanopia (blue-blind)

#6A5753

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #645c38;
/* rgb */ color: rgb(100, 92, 56);
/* oklch */ color: oklch(47.3% 0.054 97.2);

Tailwind

colors: {
  custom: {
    50: '#918a6f',
    500: '#645c38',
    950: '#000000',
  },
}

SCSS

$custom: #645c38;
$custom-light: #918a6f;
$custom-dark: #000000;

JSON

{
  "hex": "#645c38",
  "rgb": {
    "r": 100,
    "g": 92,
    "b": 56
  },
  "hsl": {
    "h": 49.091,
    "s": 28.205,
    "l": 30.588
  },
  "oklch": {
    "l": 0.47312,
    "c": 0.05381,
    "h": 97.2
  },
  "luminance": 0.10649
}

Semantic roles & 50–950 ramp

primary

#645C38

secondary

#636C94

accent

#75C563

background

#F9F8F6

surface

#F1F0EC

border

#CBCBC7

text

#0D0B07

muted

#7E7C7A

Preview Lab

Preview with #645C38

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

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