#A7988A

CSS

:root {
  --earl-grey: #a7988a;
  --earl-grey-rgb: 167 152 138;
  --earl-grey-oklch: oklch(0.689 0.027 65.4);
}

.element {
  color: var(--earl-grey);
  background-color: hsl(29 14% 60%);
  border-color: oklch(0.689 0.027 65.4);
}

Tailwind CSS v4

@theme {
  --color-earl-grey: #a7988a;
  --color-earl-grey-50: #fbf4ed;
  --color-earl-grey-100: #eee6df;
  --color-earl-grey-200: #dcd2c8;
  --color-earl-grey-300: #c1b5a9;
  --color-earl-grey-400: #aa9c8e;
  --color-earl-grey-500: #938374;
  --color-earl-grey-600: #7c6f62;
  --color-earl-grey-700: #64594e;
  --color-earl-grey-800: #494139;
  --color-earl-grey-900: #332c27;
  --color-earl-grey-950: #1e1a15;
}

SCSS

$earl-grey: #a7988a;
$earl-grey-rgb: 167, 152, 138;
$earl-grey-light: mix(#fff, $earl-grey, 20%);
$earl-grey-dark: mix(#000, $earl-grey, 20%);

.element {
  color: $earl-grey;
  box-shadow: 0 0 0 2px rgba($earl-grey, 0.35);
}