#645E1B#645E1B

#645E1B is a mid, moderate yellow. Relative luminance 0.108; OKLCH L 47.4% C 0.086 H 104.2°. Best body text is #FFFFFF at 6.65:1 contrast (WCAG AA passes).

Color values

HEX	#645E1B
RGB	rgb(100, 94, 27)
HSL	hsl(55, 57%, 25%)
HSV	hsv(55, 73%, 39%)
CMYK	cmyk(0%, 6%, 73%, 60.8%)
CIE-LAB	lab(39.23, -6.38, 37.47)
CIE-LCH	lch(39.23, 38.01, 99.67°)
OKLab	oklab(47.4% -0.0211 0.0838)
OKLCH	oklch(47.4% 0.086 104.2)
XYZ	xyz(9.4564, 10.7942, 2.6221)
Luminance	0.1079 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645E1B #1B2164

analogous

#64391B #645E1B #46641B

triadic

#645E1B #1B645E #5E1B64

tetradic

#645E1B #1B6439 #1B2164 #641B46

square

#645E1B #1B6439 #1B2164 #641B46

split-complementary

#645E1B #1B4664 #391B64

monochromatic

#181707 #34310E #645E1B #948B28 #C4B935

Accessibility & contrast

On white

6.65

#645E1B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#645E1B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645E1B

6.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645E1B	#FFFFFF	#000000	##FFFFFF
##645E1B	1.00	6.65	3.16	6.65
#FFFFFF	6.65	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#675B11

Deuteranopia (green-blind)

#695E1F

Tritanopia (blue-blind)

#6C5751

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #645e1b;
/* rgb */ color: rgb(100, 94, 27);
/* oklch */ color: oklch(47.4% 0.086 104.2);

Tailwind

colors: {
  custom: {
    50: '#938b5c',
    500: '#645e1b',
    950: '#000000',
  },
}

SCSS

$custom: #645e1b;
$custom-light: #938b5c;
$custom-dark: #000000;

JSON

{
  "hex": "#645e1b",
  "rgb": {
    "r": 100,
    "g": 94,
    "b": 27
  },
  "hsl": {
    "h": 55.068,
    "s": 57.48,
    "l": 24.902
  },
  "oklch": {
    "l": 0.47395,
    "c": 0.08641,
    "h": 104.2
  },
  "luminance": 0.10794
}

Semantic roles & 50–950 ramp

primary

#645E1B

secondary

#414999

accent

#54E147

background

#F9F8F5

surface

#F2F0E9

border

#CCCBC5

text

#0D0B04

muted

#7E7C79

Preview Lab

Preview with #645E1B

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

Preview Lab → · Contrast checker → · Palette generator →