#645D1B#645D1B

#645D1B is a mid, moderate yellow. Relative luminance 0.106; OKLCH L 47.2% C 0.085 H 103.2°. Best body text is #FFFFFF at 6.72:1 contrast (WCAG AA passes).

Color values

HEX	#645D1B
RGB	rgb(100, 93, 27)
HSL	hsl(54, 57%, 25%)
HSV	hsv(54, 73%, 39%)
CMYK	cmyk(0%, 7%, 73%, 60.8%)
CIE-LAB	lab(38.93, -5.80, 37.17)
CIE-LCH	lch(38.93, 37.62, 98.87°)
OKLab	oklab(47.15% -0.0195 0.0831)
OKLCH	oklch(47.15% 0.085 103.2)
XYZ	xyz(9.3681, 10.6175, 2.5926)
Luminance	0.1062 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645D1B #1B2264

analogous

#64391B #645D1B #46641B

triadic

#645D1B #1B645D #5D1B64

tetradic

#645D1B #1B6439 #1B2264 #641B46

square

#645D1B #1B6439 #1B2264 #641B46

split-complementary

#645D1B #1B4664 #391B64

monochromatic

#181607 #34300E #645D1B #948A28 #C4B735

Accessibility & contrast

On white

6.72

#645D1B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#645D1B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645D1B

6.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645D1B	#FFFFFF	#000000	##FFFFFF
##645D1B	1.00	6.72	3.12	6.72
#FFFFFF	6.72	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#665A11

Deuteranopia (green-blind)

#685D1F

Tritanopia (blue-blind)

#6C5650

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #645d1b;
/* rgb */ color: rgb(100, 93, 27);
/* oklch */ color: oklch(47.2% 0.085 103.2);

Tailwind

colors: {
  custom: {
    50: '#938a5c',
    500: '#645d1b',
    950: '#000000',
  },
}

SCSS

$custom: #645d1b;
$custom-light: #938a5c;
$custom-dark: #000000;

JSON

{
  "hex": "#645d1b",
  "rgb": {
    "r": 100,
    "g": 93,
    "b": 27
  },
  "hsl": {
    "h": 54.247,
    "s": 57.48,
    "l": 24.902
  },
  "oklch": {
    "l": 0.47154,
    "c": 0.08539,
    "h": 103.2
  },
  "luminance": 0.10617
}

Semantic roles & 50–950 ramp

primary

#645D1B

secondary

#414A99

accent

#56E147

background

#F9F8F5

surface

#F2F0E9

border

#CCCBC5

text

#0D0B04

muted

#7E7C79

Preview Lab

Preview with #645D1B

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

Preview Lab → · Contrast checker → · Palette generator →