#686C74

CSS

:root {
  --made-in-the-shade: #686c74;
  --made-in-the-shade-rgb: 104 108 116;
  --made-in-the-shade-oklch: oklch(0.531 0.013 264.5);
}

.element {
  color: var(--made-in-the-shade);
  background-color: hsl(220 5% 43%);
  border-color: oklch(0.531 0.013 264.5);
}

Tailwind CSS v4

@theme {
  --color-made-in-the-shade: #686c74;
  --color-made-in-the-shade-50: #f3f5f9;
  --color-made-in-the-shade-100: #e6e8ec;
  --color-made-in-the-shade-200: #d1d4da;
  --color-made-in-the-shade-300: #b4b7be;
  --color-made-in-the-shade-400: #9a9ea7;
  --color-made-in-the-shade-500: #82868f;
  --color-made-in-the-shade-600: #6e7279;
  --color-made-in-the-shade-700: #585b61;
  --color-made-in-the-shade-800: #404247;
  --color-made-in-the-shade-900: #2c2e31;
  --color-made-in-the-shade-950: #191b1d;
}

SCSS

$made-in-the-shade: #686c74;
$made-in-the-shade-rgb: 104, 108, 116;
$made-in-the-shade-light: mix(#fff, $made-in-the-shade, 20%);
$made-in-the-shade-dark: mix(#000, $made-in-the-shade, 20%);

.element {
  color: $made-in-the-shade;
  box-shadow: 0 0 0 2px rgba($made-in-the-shade, 0.35);
}