#645C2F#645C2F

#645C2F is a mid, moderate yellow. Relative luminance 0.106; OKLCH L 47.2% C 0.065 H 99.4°. Best body text is #FFFFFF at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#645C2F
RGB	rgb(100, 92, 47)
HSL	hsl(51, 36%, 29%)
HSV	hsv(51, 53%, 39%)
CMYK	cmyk(0%, 8%, 53%, 60.8%)
CIE-LAB	lab(38.85, -3.58, 26.86)
CIE-LCH	lch(38.85, 27.10, 97.59°)
OKLab	oklab(47.16% -0.0106 0.0639)
OKLCH	oklch(47.16% 0.065 99.4)
XYZ	xyz(9.5961, 10.5692, 4.2234)
Luminance	0.1057 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645C2F #2F3764

analogous

#64422F #645C2F #52642F

triadic

#645C2F #2F645C #5C2F64

tetradic

#645C2F #2F6442 #2F3764 #642F52

square

#645C2F #2F6442 #2F3764 #642F52

split-complementary

#645C2F #2F5264 #422F64

monochromatic

#15130A #3A361B #645C2F #8E8243 #B2A55B

Accessibility & contrast

On white

6.74

#645C2F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#645C2F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645C2F

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645C2F	#FFFFFF	#000000	##FFFFFF
##645C2F	1.00	6.74	3.11	6.74
#FFFFFF	6.74	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#645A2B

Deuteranopia (green-blind)

#665D31

Tritanopia (blue-blind)

#6B5651

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #645c2f;
/* rgb */ color: rgb(100, 92, 47);
/* oklch */ color: oklch(47.2% 0.065 99.4);

Tailwind

colors: {
  custom: {
    50: '#918a69',
    500: '#645c2f',
    950: '#000000',
  },
}

SCSS

$custom: #645c2f;
$custom-light: #918a69;
$custom-dark: #000000;

JSON

{
  "hex": "#645c2f",
  "rgb": {
    "r": 100,
    "g": 92,
    "b": 47
  },
  "hsl": {
    "h": 50.943,
    "s": 36.054,
    "l": 28.824
  },
  "oklch": {
    "l": 0.47158,
    "c": 0.06479,
    "h": 99.4
  },
  "luminance": 0.10569
}

Semantic roles & 50–950 ramp

primary

#645C2F

secondary

#596296

accent

#6DCC5C

background

#F9F8F6

surface

#F1F0EB

border

#CBCBC6

text

#0D0B06

muted

#7E7C7A

Preview Lab

Preview with #645C2F

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

Preview Lab → · Contrast checker → · Palette generator →