#645C2B#645C2B

#645C2B is a mid, moderate yellow. Relative luminance 0.105; OKLCH L 47.1% C 0.069 H 100.2°. Best body text is #FFFFFF at 6.76:1 contrast (WCAG AA passes).

Color values

HEX	#645C2B
RGB	rgb(100, 92, 43)
HSL	hsl(52, 40%, 28%)
HSV	hsv(52, 57%, 39%)
CMYK	cmyk(0%, 8%, 57%, 60.8%)
CIE-LAB	lab(38.79, -3.98, 29.01)
CIE-LCH	lch(38.79, 29.28, 97.80°)
OKLab	oklab(47.1% -0.0122 0.0682)
OKLCH	oklch(47.1% 0.069 100.2)
XYZ	xyz(9.5190, 10.5384, 3.8177)
Luminance	0.1054 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645C2B #2B3364

analogous

#643F2B #645C2B #4F642B

triadic

#645C2B #2B645C #5C2B64

tetradic

#645C2B #2B643F #2B3364 #642B4F

square

#645C2B #2B643F #2B3364 #642B4F

split-complementary

#645C2B #2B4F64 #3F2B64

monochromatic

#151409 #393519 #645C2B #8F833D #B5A854

Accessibility & contrast

On white

6.76

#645C2B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#645C2B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645C2B

6.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645C2B	#FFFFFF	#000000	##FFFFFF
##645C2B	1.00	6.76	3.11	6.76
#FFFFFF	6.76	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#645A26

Deuteranopia (green-blind)

#665D2D

Tritanopia (blue-blind)

#6B5651

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #645c2b;
/* rgb */ color: rgb(100, 92, 43);
/* oklch */ color: oklch(47.1% 0.069 100.2);

Tailwind

colors: {
  custom: {
    50: '#928a66',
    500: '#645c2b',
    950: '#000000',
  },
}

SCSS

$custom: #645c2b;
$custom-light: #928a66;
$custom-dark: #000000;

JSON

{
  "hex": "#645c2b",
  "rgb": {
    "r": 100,
    "g": 92,
    "b": 43
  },
  "hsl": {
    "h": 51.579,
    "s": 39.86,
    "l": 28.039
  },
  "oklch": {
    "l": 0.47098,
    "c": 0.06929,
    "h": 100.2
  },
  "luminance": 0.10538
}

Semantic roles & 50–950 ramp

primary

#645C2B

secondary

#555E96

accent

#69D058

background

#F9F8F6

surface

#F1F0EB

border

#CBCBC6

text

#0D0B06

muted

#7E7C7A

Preview Lab

Preview with #645C2B

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

Preview Lab → · Contrast checker → · Palette generator →