#4C7B91

CSS

:root {
  --cry-me-a-river: #4c7b91;
  --cry-me-a-river-rgb: 76 123 145;
  --cry-me-a-river-oklch: oklch(0.558 0.062 229.4);
}

.element {
  color: var(--cry-me-a-river);
  background-color: hsl(199 31% 43%);
  border-color: oklch(0.558 0.062 229.4);
}

Tailwind CSS v4

@theme {
  --color-cry-me-a-river: #4c7b91;
  --color-cry-me-a-river-50: #e4f9ff;
  --color-cry-me-a-river-100: #d4ecf9;
  --color-cry-me-a-river-200: #bbdaea;
  --color-cry-me-a-river-300: #98bed2;
  --color-cry-me-a-river-400: #78a6bc;
  --color-cry-me-a-river-500: #598ea7;
  --color-cry-me-a-river-600: #4c788d;
  --color-cry-me-a-river-700: #3d6071;
  --color-cry-me-a-river-800: #2a4753;
  --color-cry-me-a-river-900: #1d313a;
  --color-cry-me-a-river-950: #0d1d24;
}

SCSS

$cry-me-a-river: #4c7b91;
$cry-me-a-river-rgb: 76, 123, 145;
$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);
}