#645B18#645B18

#645B18 is a mid, moderate yellow. Relative luminance 0.103; OKLCH L 46.6% C 0.086 H 101.5°. Best body text is #FFFFFF at 6.88:1 contrast (WCAG AA passes).

Color values

HEX	#645B18
RGB	rgb(100, 91, 24)
HSL	hsl(53, 61%, 24%)
HSV	hsv(53, 76%, 39%)
CMYK	cmyk(0%, 9%, 76%, 60.8%)
CIE-LAB	lab(38.30, -4.80, 37.85)
CIE-LCH	lch(38.30, 38.15, 97.23°)
OKLab	oklab(46.65% -0.017 0.084)
OKLCH	oklch(46.65% 0.086 101.5)
XYZ	xyz(9.1619, 10.2579, 2.3613)
Luminance	0.1026 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#645B18 #182164

analogous

#643518 #645B18 #476418

triadic

#645B18 #18645B #5B1864

tetradic

#645B18 #186435 #182164 #641847

square

#645B18 #186435 #182164 #641847

split-complementary

#645B18 #184764 #351864

monochromatic

#191606 #332E0C #645B18 #958824 #C7B530

Accessibility & contrast

On white

6.88

#645B18 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.05

#645B18 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645B18

6.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##645B18	#FFFFFF	#000000	##FFFFFF
##645B18	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)

#64580D

Deuteranopia (green-blind)

#675C1C

Tritanopia (blue-blind)

#6C544E

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #645b18;
/* rgb */ color: rgb(100, 91, 24);
/* oklch */ color: oklch(46.6% 0.086 101.5);

Tailwind

colors: {
  custom: {
    50: '#93895a',
    500: '#645b18',
    950: '#000000',
  },
}

SCSS

$custom: #645b18;
$custom-light: #93895a;
$custom-dark: #000000;

JSON

{
  "hex": "#645b18",
  "rgb": {
    "r": 100,
    "g": 91,
    "b": 24
  },
  "hsl": {
    "h": 52.895,
    "s": 61.29,
    "l": 24.314
  },
  "oklch": {
    "l": 0.46648,
    "c": 0.08569,
    "h": 101.5
  },
  "luminance": 0.10257
}

Semantic roles & 50–950 ramp

primary

#645B18

secondary

#3E499A

accent

#56E443

background

#F9F8F5

surface

#F2EFE9

border

#CCCAC5

text

#0D0B04

muted

#7E7C79

Preview Lab

Preview with #645B18

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

Preview Lab → · Contrast checker → · Palette generator →