Gravel Grey Blue

CSS

:root {
  --gravel-grey-blue: #637a82;
  --gravel-grey-blue-rgb: 99 122 130;
  --gravel-grey-blue-oklch: oklch(0.564 0.03 221);
}

.element {
  color: var(--gravel-grey-blue);
  background-color: hsl(195 14% 45%);
  border-color: oklch(0.564 0.03 221);
}

Tailwind CSS v4

@theme {
  --color-gravel-grey-blue: #637a82;
  --color-gravel-grey-blue-50: #edf7fb;
  --color-gravel-grey-blue-100: #deeaef;
  --color-gravel-grey-blue-200: #c7d7de;
  --color-gravel-grey-blue-300: #a8bbc3;
  --color-gravel-grey-blue-400: #8ca3ab;
  --color-gravel-grey-blue-500: #718b94;
  --color-gravel-grey-blue-600: #60767d;
  --color-gravel-grey-blue-700: #4d5e64;
  --color-gravel-grey-blue-800: #374549;
  --color-gravel-grey-blue-900: #263033;
  --color-gravel-grey-blue-950: #141c1f;
}

SCSS

$gravel-grey-blue: #637a82;
$gravel-grey-blue-rgb: 99, 122, 130;
$gravel-grey-blue-light: mix(#fff, $gravel-grey-blue, 20%);
$gravel-grey-blue-dark: mix(#000, $gravel-grey-blue, 20%);

.element {
  color: $gravel-grey-blue;
  box-shadow: 0 0 0 2px rgba($gravel-grey-blue, 0.35);
}