#66643A#66643A

#66643A is a mid, moderate yellow. Relative luminance 0.122; OKLCH L 49.4% C 0.061 H 106.1°. Best body text is #FFFFFF at 6.09:1 contrast (WCAG AA passes).

Color values

HEX#66643A
RGBrgb(102, 100, 58)
HSLhsl(57, 28%, 31%)
HSVhsv(57, 43%, 40%)
CMYKcmyk(0%, 2%, 43.1%, 60%)
CIE-LABlab(41.60, -6.11, 24.08)
CIE-LCHlch(41.60, 24.84, 104.23°)
OKLaboklab(49.44% -0.0168 0.0585)
OKLCHoklch(49.44% 0.061 106.1)
XYZxyz(10.8006, 12.2449, 5.7967)
Luminance0.1225 (WCAG relative)
Temperaturewarm
Familyyellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66643A #3A3C66
analogous
#664E3A #66643A #52663A
triadic
#66643A #3A6664 #643A66
tetradic
#66643A #3A664E #3A3C66 #663A52
square
#66643A #3A664E #3A3C66 #663A52
split-complementary
#66643A #3A5266 #4E3A66
monochromatic
#18180E #3F3E24 #66643A #8D8A50 #ACAA6E

Accessibility & contrast

On white

6.09
#66643A on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.45
#66643A on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #66643A
6.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66643A#FFFFFF#000000##FFFFFF
##66643A1.006.093.456.09
#FFFFFF6.091.0021.001.00
#0000003.4521.001.0021.00
##FFFFFF6.091.0021.001.00

Color blindness preview

Protanopia (red-blind)
#6B6137
Deuteranopia (green-blind)
#6C633C
Tritanopia (blue-blind)
#6C5F5A
Achromatopsia (no color)
#626262

Design tokens & code

CSS
--color: #66643a;
/* rgb */ color: rgb(102, 100, 58);
/* oklch */ color: oklch(49.4% 0.061 106.1);
Tailwind
colors: {
  custom: {
    50: '#929071',
    500: '#66643a',
    950: '#000000',
  },
}
SCSS
$custom: #66643a;
$custom-light: #929071;
$custom-dark: #000000;
JSON
{
  "hex": "#66643a",
  "rgb": {
    "r": 102,
    "g": 100,
    "b": 58
  },
  "hsl": {
    "h": 57.273,
    "s": 27.5,
    "l": 31.373
  },
  "oklch": {
    "l": 0.49444,
    "c": 0.06089,
    "h": 106.1
  },
  "luminance": 0.12245
}

Semantic roles & 50–950 ramp

primary
#66643A
secondary
#666896
accent
#68C464
background
#F9F8F6
surface
#F1F0EC
border
#CBCBC7
text
#0D0C07
muted
#7E7D7A

Preview Lab

Preview with #66643A

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

Preview Lab → · Contrast checker → · Palette generator →

#66643A Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva