#3E7C99

CSS

:root {
  --cry-me-a-river: #3e7c99;
  --cry-me-a-river-rgb: 62 124 153;
  --cry-me-a-river-oklch: oklch(0.557 0.078 230.7);
}

.element {
  color: var(--cry-me-a-river);
  background-color: hsl(199 42% 42%);
  border-color: oklch(0.557 0.078 230.7);
}

Tailwind CSS v4

@theme {
  --color-cry-me-a-river: #3e7c99;
  --color-cry-me-a-river-50: #e0faff;
  --color-cry-me-a-river-100: #cfedfe;
  --color-cry-me-a-river-200: #b4dbf1;
  --color-cry-me-a-river-300: #8fbfd9;
  --color-cry-me-a-river-400: #6da7c4;
  --color-cry-me-a-river-500: #4a90b0;
  --color-cry-me-a-river-600: #407a95;
  --color-cry-me-a-river-700: #326177;
  --color-cry-me-a-river-800: #224858;
  --color-cry-me-a-river-900: #17323d;
  --color-cry-me-a-river-950: #071d27;
}

SCSS

$cry-me-a-river: #3e7c99;
$cry-me-a-river-rgb: 62, 124, 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);
}