Petrel Blue Grey

CSS

:root {
  --petrel-blue-grey: #a0aebc;
  --petrel-blue-grey-rgb: 160 174 188;
  --petrel-blue-grey-oklch: oklch(0.744 0.026 248.2);
}

.element {
  color: var(--petrel-blue-grey);
  background-color: hsl(210 17% 68%);
  border-color: oklch(0.744 0.026 248.2);
}

Tailwind CSS v4

@theme {
  --color-petrel-blue-grey: #a0aebc;
  --color-petrel-blue-grey-50: #f0f6fc;
  --color-petrel-blue-grey-100: #e2e9f0;
  --color-petrel-blue-grey-200: #ccd5df;
  --color-petrel-blue-grey-300: #aeb9c4;
  --color-petrel-blue-grey-400: #93a0ad;
  --color-petrel-blue-grey-500: #798897;
  --color-petrel-blue-grey-600: #67737f;
  --color-petrel-blue-grey-700: #525c66;
  --color-petrel-blue-grey-800: #3b434b;
  --color-petrel-blue-grey-900: #292f34;
  --color-petrel-blue-grey-950: #171b1f;
}

SCSS

$petrel-blue-grey: #a0aebc;
$petrel-blue-grey-rgb: 160, 174, 188;
$petrel-blue-grey-light: mix(#fff, $petrel-blue-grey, 20%);
$petrel-blue-grey-dark: mix(#000, $petrel-blue-grey, 20%);

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