Mississippi River

CSS

:root {
  --mississippi-river: #3b638c;
  --mississippi-river-rgb: 59 99 140;
  --mississippi-river-oklch: oklch(0.489 0.08 250.3);
}

.element {
  color: var(--mississippi-river);
  background-color: hsl(210 41% 39%);
  border-color: oklch(0.489 0.08 250.3);
}

Tailwind CSS v4

@theme {
  --color-mississippi-river: #3b638c;
  --color-mississippi-river-50: #e5f7ff;
  --color-mississippi-river-100: #d5eaff;
  --color-mississippi-river-200: #bcd7f6;
  --color-mississippi-river-300: #9abbe0;
  --color-mississippi-river-400: #7aa2cd;
  --color-mississippi-river-500: #5c8aba;
  --color-mississippi-river-600: #4e759d;
  --color-mississippi-river-700: #3e5d7e;
  --color-mississippi-river-800: #2b455d;
  --color-mississippi-river-900: #1d3041;
  --color-mississippi-river-950: #0d1c2a;
}

SCSS

$mississippi-river: #3b638c;
$mississippi-river-rgb: 59, 99, 140;
$mississippi-river-light: mix(#fff, $mississippi-river, 20%);
$mississippi-river-dark: mix(#000, $mississippi-river, 20%);

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