#507A92

CSS

:root {
  --cry-me-a-river: #507a92;
  --cry-me-a-river-rgb: 80 122 146;
  --cry-me-a-river-oklch: oklch(0.558 0.06 234.4);
}

.element {
  color: var(--cry-me-a-river);
  background-color: hsl(202 29% 44%);
  border-color: oklch(0.558 0.06 234.4);
}

Tailwind CSS v4

@theme {
  --color-cry-me-a-river: #507a92;
  --color-cry-me-a-river-50: #e6f8ff;
  --color-cry-me-a-river-100: #d6ecfa;
  --color-cry-me-a-river-200: #bdd9eb;
  --color-cry-me-a-river-300: #9bbdd2;
  --color-cry-me-a-river-400: #7ca5bd;
  --color-cry-me-a-river-500: #5e8da8;
  --color-cry-me-a-river-600: #50778e;
  --color-cry-me-a-river-700: #405f72;
  --color-cry-me-a-river-800: #2d4654;
  --color-cry-me-a-river-900: #1e313a;
  --color-cry-me-a-river-950: #0e1d24;
}

SCSS

$cry-me-a-river: #507a92;
$cry-me-a-river-rgb: 80, 122, 146;
$cry-me-a-river-light: mix(#fff, $cry-me-a-river, 20%);
$cry-me-a-river-dark: mix(#000, $cry-me-a-river, 20%);

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