#707580

CSS

:root {
  --made-in-the-shade: #707580;
  --made-in-the-shade-rgb: 112 117 128;
  --made-in-the-shade-oklch: oklch(0.562 0.018 266.2);
}

.element {
  color: var(--made-in-the-shade);
  background-color: hsl(221 7% 47%);
  border-color: oklch(0.562 0.018 266.2);
}

Tailwind CSS v4

@theme {
  --color-made-in-the-shade: #707580;
  --color-made-in-the-shade-50: #f3f5fa;
  --color-made-in-the-shade-100: #e5e8ee;
  --color-made-in-the-shade-200: #d1d4dc;
  --color-made-in-the-shade-300: #b3b7c1;
  --color-made-in-the-shade-400: #999ea9;
  --color-made-in-the-shade-500: #818693;
  --color-made-in-the-shade-600: #6d727c;
  --color-made-in-the-shade-700: #575b63;
  --color-made-in-the-shade-800: #3f4249;
  --color-made-in-the-shade-900: #2b2e32;
  --color-made-in-the-shade-950: #191b1e;
}

SCSS

$made-in-the-shade: #707580;
$made-in-the-shade-rgb: 112, 117, 128;
$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);
}