By the Sea

CSS

:root {
  --by-the-sea: #8d999e;
  --by-the-sea-rgb: 141 153 158;
  --by-the-sea-oklch: oklch(0.675 0.016 224.6);
}

.element {
  color: var(--by-the-sea);
  background-color: hsl(198 8% 59%);
  border-color: oklch(0.675 0.016 224.6);
}

Tailwind CSS v4

@theme {
  --color-by-the-sea: #8d999e;
  --color-by-the-sea-50: #f1f6f9;
  --color-by-the-sea-100: #e3e9ec;
  --color-by-the-sea-200: #ced6d9;
  --color-by-the-sea-300: #afb9be;
  --color-by-the-sea-400: #95a1a5;
  --color-by-the-sea-500: #7c898e;
  --color-by-the-sea-600: #697478;
  --color-by-the-sea-700: #545c60;
  --color-by-the-sea-800: #3d4446;
  --color-by-the-sea-900: #2a2f31;
  --color-by-the-sea-950: #171b1d;
}

SCSS

$by-the-sea: #8d999e;
$by-the-sea-rgb: 141, 153, 158;
$by-the-sea-light: mix(#fff, $by-the-sea, 20%);
$by-the-sea-dark: mix(#000, $by-the-sea, 20%);

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