#3698B2

CSS

:root {
  --enchanted-well: #3698b2;
  --enchanted-well-rgb: 54 152 178;
  --enchanted-well-oklch: oklch(0.634 0.097 219);
}

.element {
  color: var(--enchanted-well);
  background-color: hsl(193 53% 45%);
  border-color: oklch(0.634 0.097 219);
}

Tailwind CSS v4

@theme {
  --color-enchanted-well: #3698b2;
  --color-enchanted-well-50: #d8fcff;
  --color-enchanted-well-100: #c5f0ff;
  --color-enchanted-well-200: #a7def2;
  --color-enchanted-well-300: #7ec3da;
  --color-enchanted-well-400: #54acc5;
  --color-enchanted-well-500: #1b95b1;
  --color-enchanted-well-600: #1c7e96;
  --color-enchanted-well-700: #176578;
  --color-enchanted-well-800: #0c4a58;
  --color-enchanted-well-900: #08343e;
  --color-enchanted-well-950: #001f27;
}

SCSS

$enchanted-well: #3698b2;
$enchanted-well-rgb: 54, 152, 178;
$enchanted-well-light: mix(#fff, $enchanted-well, 20%);
$enchanted-well-dark: mix(#000, $enchanted-well, 20%);

.element {
  color: $enchanted-well;
  box-shadow: 0 0 0 2px rgba($enchanted-well, 0.35);
}