#3C7B9C

CSS

:root {
  --cry-me-a-river: #3c7b9c;
  --cry-me-a-river-rgb: 60 123 156;
  --cry-me-a-river-oklch: oklch(0.555 0.083 233.8);
}

.element {
  color: var(--cry-me-a-river);
  background-color: hsl(201 44% 42%);
  border-color: oklch(0.555 0.083 233.8);
}

Tailwind CSS v4

@theme {
  --color-cry-me-a-river: #3c7b9c;
  --color-cry-me-a-river-50: #e0faff;
  --color-cry-me-a-river-100: #cfedff;
  --color-cry-me-a-river-200: #b3dbf3;
  --color-cry-me-a-river-300: #8fbfdc;
  --color-cry-me-a-river-400: #6ca7c8;
  --color-cry-me-a-river-500: #488fb4;
  --color-cry-me-a-river-600: #3e7998;
  --color-cry-me-a-river-700: #31617a;
  --color-cry-me-a-river-800: #21475a;
  --color-cry-me-a-river-900: #16313f;
  --color-cry-me-a-river-950: #071d28;
}

SCSS

$cry-me-a-river: #3c7b9c;
$cry-me-a-river-rgb: 60, 123, 156;
$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);
}