#645E1D#645E1D

#645E1D is a mid, moderate yellow. Relative luminance 0.108; OKLCH L 47.4% C 0.085 H 104.0°. Best body text is #FFFFFF at 6.64:1 contrast (WCAG AA passes).

Color values

HEX#645E1D
RGBrgb(100, 94, 29)
HSLhsl(55, 55%, 25%)
HSVhsv(55, 71%, 39%)
CMYKcmyk(0%, 6%, 71%, 60.8%)
CIE-LABlab(39.25, -6.26, 36.59)
CIE-LCHlch(39.25, 37.12, 99.70°)
OKLaboklab(47.41% -0.0205 0.0823)
OKLCHoklch(47.41% 0.085 104)
XYZxyz(9.4804, 10.8038, 2.7481)
Luminance0.1080 (WCAG relative)
Temperaturewarm
Familyyellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#645E1D #1D2364
analogous
#643B1D #645E1D #46641D
triadic
#645E1D #1D645E #5E1D64
tetradic
#645E1D #1D643B #1D2364 #641D46
square
#645E1D #1D643B #1D2364 #641D46
split-complementary
#645E1D #1D4664 #3B1D64
monochromatic
#181607 #35310F #645E1D #938B2B #C3B739

Accessibility & contrast

On white

6.64
#645E1D on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.16
#645E1D on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #645E1D
6.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##645E1D#FFFFFF#000000##FFFFFF
##645E1D1.006.643.166.64
#FFFFFF6.641.0021.001.00
#0000003.1621.001.0021.00
##FFFFFF6.641.0021.001.00

Color blindness preview

Protanopia (red-blind)
#675B14
Deuteranopia (green-blind)
#695E21
Tritanopia (blue-blind)
#6C5751
Achromatopsia (no color)
#5C5C5C

Design tokens & code

CSS
--color: #645e1d;
/* rgb */ color: rgb(100, 94, 29);
/* oklch */ color: oklch(47.4% 0.085 104.0);
Tailwind
colors: {
  custom: {
    50: '#938b5d',
    500: '#645e1d',
    950: '#000000',
  },
}
SCSS
$custom: #645e1d;
$custom-light: #938b5d;
$custom-dark: #000000;
JSON
{
  "hex": "#645e1d",
  "rgb": {
    "r": 100,
    "g": 94,
    "b": 29
  },
  "hsl": {
    "h": 54.93,
    "s": 55.039,
    "l": 25.294
  },
  "oklch": {
    "l": 0.47413,
    "c": 0.08482,
    "h": 104
  },
  "luminance": 0.10803
}

Semantic roles & 50–950 ramp

primary
#645E1D
secondary
#444B99
accent
#56DE49
background
#F9F8F5
surface
#F2F0E9
border
#CCCBC5
text
#0D0B04
muted
#7E7C79

Preview Lab

Preview with #645E1D

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

Preview Lab → · Contrast checker → · Palette generator →

#645E1D Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva