Crystal Blue

CSS

:root {
  --crystal-blue: #68a0b0;
  --crystal-blue-rgb: 104 160 176;
  --crystal-blue-oklch: oklch(0.673 0.063 217.8);
}

.element {
  color: var(--crystal-blue);
  background-color: hsl(193 31% 55%);
  border-color: oklch(0.673 0.063 217.8);
}

Tailwind CSS v4

@theme {
  --color-crystal-blue: #68a0b0;
  --color-crystal-blue-50: #e2faff;
  --color-crystal-blue-100: #d2edf7;
  --color-crystal-blue-200: #b7dbe7;
  --color-crystal-blue-300: #94c0ce;
  --color-crystal-blue-400: #73a8b7;
  --color-crystal-blue-500: #5291a2;
  --color-crystal-blue-600: #467a89;
  --color-crystal-blue-700: #38626e;
  --color-crystal-blue-800: #274850;
  --color-crystal-blue-900: #1a3238;
  --color-crystal-blue-950: #0a1e23;
}

SCSS

$crystal-blue: #68a0b0;
$crystal-blue-rgb: 104, 160, 176;
$crystal-blue-light: mix(#fff, $crystal-blue, 20%);
$crystal-blue-dark: mix(#000, $crystal-blue, 20%);

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