#4D7C96

CSS

:root {
  --cry-me-a-river: #4d7c96;
  --cry-me-a-river-rgb: 77 124 150;
  --cry-me-a-river-oklch: oklch(0.563 0.065 233.8);
}

.element {
  color: var(--cry-me-a-river);
  background-color: hsl(201 32% 45%);
  border-color: oklch(0.563 0.065 233.8);
}

Tailwind CSS v4

@theme {
  --color-cry-me-a-river: #4d7c96;
  --color-cry-me-a-river-50: #e4f9ff;
  --color-cry-me-a-river-100: #d4ecfb;
  --color-cry-me-a-river-200: #bbd9ed;
  --color-cry-me-a-river-300: #98bdd5;
  --color-cry-me-a-river-400: #78a5bf;
  --color-cry-me-a-river-500: #598eab;
  --color-cry-me-a-river-600: #4c7890;
  --color-cry-me-a-river-700: #3c6074;
  --color-cry-me-a-river-800: #2a4755;
  --color-cry-me-a-river-900: #1c313b;
  --color-cry-me-a-river-950: #0c1d25;
}

SCSS

$cry-me-a-river: #4d7c96;
$cry-me-a-river-rgb: 77, 124, 150;
$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);
}