#697685

CSS

:root {
  --made-in-the-shade: #697685;
  --made-in-the-shade-rgb: 105 118 133;
  --made-in-the-shade-oklch: oklch(0.56 0.028 252.1);
}

.element {
  color: var(--made-in-the-shade);
  background-color: hsl(212 12% 47%);
  border-color: oklch(0.56 0.028 252.1);
}

Tailwind CSS v4

@theme {
  --color-made-in-the-shade: #697685;
  --color-made-in-the-shade-50: #f0f6fd;
  --color-made-in-the-shade-100: #e2e9f1;
  --color-made-in-the-shade-200: #ccd5e0;
  --color-made-in-the-shade-300: #aeb8c6;
  --color-made-in-the-shade-400: #93a0af;
  --color-made-in-the-shade-500: #798899;
  --color-made-in-the-shade-600: #677381;
  --color-made-in-the-shade-700: #525c67;
  --color-made-in-the-shade-800: #3b434c;
  --color-made-in-the-shade-900: #292e35;
  --color-made-in-the-shade-950: #161b20;
}

SCSS

$made-in-the-shade: #697685;
$made-in-the-shade-rgb: 105, 118, 133;
$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);
}