#3D7B9E

CSS

:root {
  --cry-me-a-river: #3d7b9e;
  --cry-me-a-river-rgb: 61 123 158;
  --cry-me-a-river-oklch: oklch(0.557 0.084 235.8);
}

.element {
  color: var(--cry-me-a-river);
  background-color: hsl(202 44% 43%);
  border-color: oklch(0.557 0.084 235.8);
}

Tailwind CSS v4

@theme {
  --color-cry-me-a-river: #3d7b9e;
  --color-cry-me-a-river-50: #e0f9ff;
  --color-cry-me-a-river-100: #cfedff;
  --color-cry-me-a-river-200: #b4daf4;
  --color-cry-me-a-river-300: #8fbede;
  --color-cry-me-a-river-400: #6ca7c9;
  --color-cry-me-a-river-500: #498fb6;
  --color-cry-me-a-river-600: #3f799a;
  --color-cry-me-a-river-700: #32617b;
  --color-cry-me-a-river-800: #22475b;
  --color-cry-me-a-river-900: #163140;
  --color-cry-me-a-river-950: #071d29;
}

SCSS

$cry-me-a-river: #3d7b9e;
$cry-me-a-river-rgb: 61, 123, 158;
$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);
}