#487A97

CSS

:root {
  --cry-me-a-river: #487a97;
  --cry-me-a-river-rgb: 72 122 151;
  --cry-me-a-river-oklch: oklch(0.556 0.07 235.4);
}

.element {
  color: var(--cry-me-a-river);
  background-color: hsl(202 35% 44%);
  border-color: oklch(0.556 0.07 235.4);
}

Tailwind CSS v4

@theme {
  --color-cry-me-a-river: #487a97;
  --color-cry-me-a-river-50: #e3f9ff;
  --color-cry-me-a-river-100: #d3ecfd;
  --color-cry-me-a-river-200: #b9d9ef;
  --color-cry-me-a-river-300: #96bdd7;
  --color-cry-me-a-river-400: #75a6c3;
  --color-cry-me-a-river-500: #558eae;
  --color-cry-me-a-river-600: #497893;
  --color-cry-me-a-river-700: #3a6076;
  --color-cry-me-a-river-800: #284757;
  --color-cry-me-a-river-900: #1b313d;
  --color-cry-me-a-river-950: #0b1d26;
}

SCSS

$cry-me-a-river: #487a97;
$cry-me-a-river-rgb: 72, 122, 151;
$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);
}