#477A99

CSS

:root {
  --cry-me-a-river: #477a99;
  --cry-me-a-river-rgb: 71 122 153;
  --cry-me-a-river-oklch: oklch(0.557 0.073 236.8);
}

.element {
  color: var(--cry-me-a-river);
  background-color: hsl(203 37% 44%);
  border-color: oklch(0.557 0.073 236.8);
}

Tailwind CSS v4

@theme {
  --color-cry-me-a-river: #477a99;
  --color-cry-me-a-river-50: #e3f9ff;
  --color-cry-me-a-river-100: #d2ecfe;
  --color-cry-me-a-river-200: #b8d9f1;
  --color-cry-me-a-river-300: #95bdd9;
  --color-cry-me-a-river-400: #74a5c4;
  --color-cry-me-a-river-500: #548eb1;
  --color-cry-me-a-river-600: #487895;
  --color-cry-me-a-river-700: #396078;
  --color-cry-me-a-river-800: #284758;
  --color-cry-me-a-river-900: #1a313e;
  --color-cry-me-a-river-950: #0b1d27;
}

SCSS

$cry-me-a-river: #477a99;
$cry-me-a-river-rgb: 71, 122, 153;
$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);
}