#645B19#645B19

#645B19 is a mid, moderate yellow. Relative luminance 0.103; OKLCH L 46.7% C 0.085 H 101.4°. Best body text is #FFFFFF at 6.88:1 contrast (WCAG AA passes).

Color values

HEX	#645B19
RGB	rgb(100, 91, 25)
HSL	hsl(53, 60%, 25%)
HSV	hsv(53, 75%, 39%)
CMYK	cmyk(0%, 9%, 75%, 60.8%)
CIE-LAB	lab(38.31, -4.75, 37.43)
CIE-LCH	lch(38.31, 37.73, 97.23°)
OKLab	oklab(46.66% -0.0168 0.0833)
OKLCH	oklch(46.66% 0.085 101.4)
XYZ	xyz(9.1725, 10.2621, 2.4171)
Luminance	0.1026 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645B19 #192264

analogous

#643619 #645B19 #486419

triadic

#645B19 #19645B #5B1964

tetradic

#645B19 #196436 #192264 #641948

square

#645B19 #196436 #192264 #641948

split-complementary

#645B19 #194864 #361964

monochromatic

#181606 #332E0D #645B19 #958825 #C6B431

Accessibility & contrast

On white

6.88

#645B19 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.05

#645B19 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645B19

6.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645B19	#FFFFFF	#000000	##FFFFFF
##645B19	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)

#64580F

Deuteranopia (green-blind)

#675C1D

Tritanopia (blue-blind)

#6C544E

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #645b19;
/* rgb */ color: rgb(100, 91, 25);
/* oklch */ color: oklch(46.7% 0.085 101.4);

Tailwind

colors: {
  custom: {
    50: '#93895a',
    500: '#645b19',
    950: '#000000',
  },
}

SCSS

$custom: #645b19;
$custom-light: #93895a;
$custom-dark: #000000;

JSON

{
  "hex": "#645b19",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 25
  },
  "hsl": {
    "h": 52.8,
    "s": 60,
    "l": 24.51
  },
  "oklch": {
    "l": 0.46656,
    "c": 0.08496,
    "h": 101.4
  },
  "luminance": 0.10262
}

Semantic roles & 50–950 ramp

primary

#645B19

secondary

#3F4A9A

accent

#58E345

background

#F9F8F5

surface

#F2EFE9

border

#CCCAC5

text

#0D0B04

muted

#7E7C79

Preview Lab

Preview with #645B19

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

Preview Lab → · Contrast checker → · Palette generator →