#6B7681

CSS

:root {
  --made-in-the-shade: #6b7681;
  --made-in-the-shade-rgb: 107 118 129;
  --made-in-the-shade-oklch: oklch(0.56 0.022 248.2);
}

.element {
  color: var(--made-in-the-shade);
  background-color: hsl(210 9% 46%);
  border-color: oklch(0.56 0.022 248.2);
}

Tailwind CSS v4

@theme {
  --color-made-in-the-shade: #6b7681;
  --color-made-in-the-shade-50: #f1f6fb;
  --color-made-in-the-shade-100: #e3e9ef;
  --color-made-in-the-shade-200: #ced5dd;
  --color-made-in-the-shade-300: #afb8c2;
  --color-made-in-the-shade-400: #95a0ab;
  --color-made-in-the-shade-500: #7b8894;
  --color-made-in-the-shade-600: #68737d;
  --color-made-in-the-shade-700: #535c64;
  --color-made-in-the-shade-800: #3c434a;
  --color-made-in-the-shade-900: #2a2e33;
  --color-made-in-the-shade-950: #171b1f;
}

SCSS

$made-in-the-shade: #6b7681;
$made-in-the-shade-rgb: 107, 118, 129;
$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);
}