#645C3F#645C3F

#645C3F is a mid, muted yellow. Relative luminance 0.107; OKLCH L 47.5% C 0.045 H 94.5°. Best body text is #FFFFFF at 6.68:1 contrast (WCAG AA passes).

Color values

HEX	#645C3F
RGB	rgb(100, 92, 63)
HSL	hsl(47, 23%, 32%)
HSV	hsv(47, 37%, 39%)
CMYK	cmyk(0%, 8%, 37%, 60.8%)
CIE-LAB	lab(39.11, -1.66, 17.88)
CIE-LCH	lch(39.11, 17.96, 95.29°)
OKLab	oklab(47.45% -0.0035 0.0445)
OKLCH	oklch(47.45% 0.045 94.5)
XYZ	xyz(9.9800, 10.7228, 6.2457)
Luminance	0.1072 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645C3F #3F4764

analogous

#644A3F #645C3F #5A643F

triadic

#645C3F #3F645C #5C3F64

tetradic

#645C3F #3F644A #3F4764 #643F5A

square

#645C3F #3F644A #3F4764 #643F5A

split-complementary

#645C3F #3F5A64 #4A3F64

monochromatic

#191710 #3E3927 #645C3F #8A7F57 #A89D75

Accessibility & contrast

On white

6.68

#645C3F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#645C3F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645C3F

6.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645C3F	#FFFFFF	#000000	##FFFFFF
##645C3F	1.00	6.68	3.14	6.68
#FFFFFF	6.68	1.00	21.00	1.00
#000000	3.14	21.00	1.00	21.00
##FFFFFF	6.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#625B3D

Deuteranopia (green-blind)

#645D40

Tritanopia (blue-blind)

#6A5854

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #645c3f;
/* rgb */ color: rgb(100, 92, 63);
/* oklch */ color: oklch(47.5% 0.045 94.5);

Tailwind

colors: {
  custom: {
    50: '#918a74',
    500: '#645c3f',
    950: '#000000',
  },
}

SCSS

$custom: #645c3f;
$custom-light: #918a74;
$custom-dark: #000000;

JSON

{
  "hex": "#645c3f",
  "rgb": {
    "r": 100,
    "g": 92,
    "b": 63
  },
  "hsl": {
    "h": 47.027,
    "s": 22.699,
    "l": 31.961
  },
  "oklch": {
    "l": 0.47453,
    "c": 0.04462,
    "h": 94.5
  },
  "luminance": 0.10722
}

Semantic roles & 50–950 ramp

primary

#645C3F

secondary

#6B7494

accent

#7BBF69

background

#F8F8F7

surface

#F0F0ED

border

#CBCBC8

text

#0D0B08

muted

#7D7C7B

Preview Lab

Preview with #645C3F

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

Preview Lab → · Contrast checker → · Palette generator →