#487B93

CSS

:root {
  --cry-me-a-river: #487b93;
  --cry-me-a-river-rgb: 72 123 147;
  --cry-me-a-river-oklch: oklch(0.557 0.066 229.9);
}

.element {
  color: var(--cry-me-a-river);
  background-color: hsl(199 34% 43%);
  border-color: oklch(0.557 0.066 229.9);
}

Tailwind CSS v4

@theme {
  --color-cry-me-a-river: #487b93;
  --color-cry-me-a-river-50: #e3f9ff;
  --color-cry-me-a-river-100: #d3ecfb;
  --color-cry-me-a-river-200: #b9daec;
  --color-cry-me-a-river-300: #96bed4;
  --color-cry-me-a-river-400: #75a6be;
  --color-cry-me-a-river-500: #558faa;
  --color-cry-me-a-river-600: #49798f;
  --color-cry-me-a-river-700: #3a6173;
  --color-cry-me-a-river-800: #284754;
  --color-cry-me-a-river-900: #1b313b;
  --color-cry-me-a-river-950: #0b1d25;
}

SCSS

$cry-me-a-river: #487b93;
$cry-me-a-river-rgb: 72, 123, 147;
$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);
}