#645B17#645B17

#645B17 is a mid, moderate yellow. Relative luminance 0.103; OKLCH L 46.6% C 0.086 H 101.6°. Best body text is #FFFFFF at 6.88:1 contrast (WCAG AA passes).

Color values

HEX	#645B17
RGB	rgb(100, 91, 23)
HSL	hsl(53, 63%, 24%)
HSV	hsv(53, 77%, 39%)
CMYK	cmyk(0%, 9%, 77%, 60.8%)
CIE-LAB	lab(38.29, -4.86, 38.26)
CIE-LCH	lch(38.29, 38.57, 97.23°)
OKLab	oklab(46.64% -0.0173 0.0847)
OKLCH	oklch(46.64% 0.086 101.6)
XYZ	xyz(9.1517, 10.2538, 2.3076)
Luminance	0.1025 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645B17 #172064

analogous

#643517 #645B17 #476417

triadic

#645B17 #17645B #5B1764

tetradic

#645B17 #176435 #172064 #641747

square

#645B17 #176435 #172064 #641747

split-complementary

#645B17 #174764 #351764

monochromatic

#191706 #322E0C #645B17 #968822 #C8B62E

Accessibility & contrast

On white

6.88

#645B17 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.05

#645B17 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645B17

6.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645B17	#FFFFFF	#000000	##FFFFFF
##645B17	1.00	6.88	3.05	6.88
#FFFFFF	6.88	1.00	21.00	1.00
#000000	3.05	21.00	1.00	21.00
##FFFFFF	6.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#64580B

Deuteranopia (green-blind)

#675C1C

Tritanopia (blue-blind)

#6C544E

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #645b17;
/* rgb */ color: rgb(100, 91, 23);
/* oklch */ color: oklch(46.6% 0.086 101.6);

Tailwind

colors: {
  custom: {
    50: '#938959',
    500: '#645b17',
    950: '#000000',
  },
}

SCSS

$custom: #645b17;
$custom-light: #938959;
$custom-dark: #000000;

JSON

{
  "hex": "#645b17",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 23
  },
  "hsl": {
    "h": 52.987,
    "s": 62.602,
    "l": 24.118
  },
  "oklch": {
    "l": 0.4664,
    "c": 0.0864,
    "h": 101.6
  },
  "luminance": 0.10253
}

Semantic roles & 50–950 ramp

primary

#645B17

secondary

#3C479A

accent

#55E642

background

#F9F8F5

surface

#F2EFE9

border

#CCCAC5

text

#0D0B04

muted

#7E7C79

Preview Lab

Preview with #645B17

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

Preview Lab → · Contrast checker → · Palette generator →