#14A6D9

CSS

:root {
  --mystic-blue: #14a6d9;
  --mystic-blue-rgb: 20 166 217;
  --mystic-blue-oklch: oklch(0.68 0.132 229.8);
}

.element {
  color: var(--mystic-blue);
  background-color: hsl(196 83% 46%);
  border-color: oklch(0.68 0.132 229.8);
}

Tailwind CSS v4

@theme {
  --color-mystic-blue: #14a6d9;
  --color-mystic-blue-50: #d0fdff;
  --color-mystic-blue-100: #bcf1ff;
  --color-mystic-blue-200: #9adfff;
  --color-mystic-blue-300: #6bc3ef;
  --color-mystic-blue-400: #31acdd;
  --color-mystic-blue-500: #0094cc;
  --color-mystic-blue-600: #007dac;
  --color-mystic-blue-700: #00648a;
  --color-mystic-blue-800: #004a66;
  --color-mystic-blue-900: #003447;
  --color-mystic-blue-950: #001f2f;
}

SCSS

$mystic-blue: #14a6d9;
$mystic-blue-rgb: 20, 166, 217;
$mystic-blue-light: mix(#fff, $mystic-blue, 20%);
$mystic-blue-dark: mix(#000, $mystic-blue, 20%);

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