Coastline Blue

CSS

:root {
  --coastline-blue: #4398bc;
  --coastline-blue-rgb: 67 152 188;
  --coastline-blue-oklch: oklch(0.642 0.097 228.9);
}

.element {
  color: var(--coastline-blue);
  background-color: hsl(198 47% 50%);
  border-color: oklch(0.642 0.097 228.9);
}

Tailwind CSS v4

@theme {
  --color-coastline-blue: #4398bc;
  --color-coastline-blue-50: #dafbff;
  --color-coastline-blue-100: #c8efff;
  --color-coastline-blue-200: #aaddf7;
  --color-coastline-blue-300: #83c1e0;
  --color-coastline-blue-400: #5baacc;
  --color-coastline-blue-500: #2d92b9;
  --color-coastline-blue-600: #297b9c;
  --color-coastline-blue-700: #21637e;
  --color-coastline-blue-800: #14495c;
  --color-coastline-blue-900: #0d3341;
  --color-coastline-blue-950: #011e29;
}

SCSS

$coastline-blue: #4398bc;
$coastline-blue-rgb: 67, 152, 188;
$coastline-blue-light: mix(#fff, $coastline-blue, 20%);
$coastline-blue-dark: mix(#000, $coastline-blue, 20%);

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