#4A7A9A

CSS

:root {
  --cry-me-a-river: #4a7a9a;
  --cry-me-a-river-rgb: 74 122 154;
  --cry-me-a-river-oklch: oklch(0.559 0.072 239.1);
}

.element {
  color: var(--cry-me-a-river);
  background-color: hsl(204 35% 45%);
  border-color: oklch(0.559 0.072 239.1);
}

Tailwind CSS v4

@theme {
  --color-cry-me-a-river: #4a7a9a;
  --color-cry-me-a-river-50: #e4f8ff;
  --color-cry-me-a-river-100: #d3ecfe;
  --color-cry-me-a-river-200: #bad9f1;
  --color-cry-me-a-river-300: #97bdd9;
  --color-cry-me-a-river-400: #76a5c5;
  --color-cry-me-a-river-500: #578db1;
  --color-cry-me-a-river-600: #4a7796;
  --color-cry-me-a-river-700: #3b5f78;
  --color-cry-me-a-river-800: #294658;
  --color-cry-me-a-river-900: #1b313e;
  --color-cry-me-a-river-950: #0c1d27;
}

SCSS

$cry-me-a-river: #4a7a9a;
$cry-me-a-river-rgb: 74, 122, 154;
$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);
}