Blue Cascade

CSS

:root {
  --blue-cascade: #7b9eb0;
  --blue-cascade-rgb: 123 158 176;
  --blue-cascade-oklch: oklch(0.679 0.047 230.6);
}

.element {
  color: var(--blue-cascade);
  background-color: hsl(200 25% 59%);
  border-color: oklch(0.679 0.047 230.6);
}

Tailwind CSS v4

@theme {
  --color-blue-cascade: #7b9eb0;
  --color-blue-cascade-50: #e9f8ff;
  --color-blue-cascade-100: #d9ebf5;
  --color-blue-cascade-200: #c1d8e5;
  --color-blue-cascade-300: #a0bccc;
  --color-blue-cascade-400: #83a4b5;
  --color-blue-cascade-500: #668ca0;
  --color-blue-cascade-600: #577787;
  --color-blue-cascade-700: #455f6c;
  --color-blue-cascade-800: #31464f;
  --color-blue-cascade-900: #213037;
  --color-blue-cascade-950: #111c22;
}

SCSS

$blue-cascade: #7b9eb0;
$blue-cascade-rgb: 123, 158, 176;
$blue-cascade-light: mix(#fff, $blue-cascade, 20%);
$blue-cascade-dark: mix(#000, $blue-cascade, 20%);

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