#236AF9

CSS

:root {
  --blue-ribbon: #236af9;
  --blue-ribbon-rgb: 35 106 249;
  --blue-ribbon-oklch: oklch(0.571 0.225 262.2);
}

.element {
  color: var(--blue-ribbon);
  background-color: hsl(220 95% 56%);
  border-color: oklch(0.571 0.225 262.2);
}

Tailwind CSS v4

@theme {
  --color-blue-ribbon: #236af9;
  --color-blue-ribbon-50: #d5f5ff;
  --color-blue-ribbon-100: #c2e7ff;
  --color-blue-ribbon-200: #a3d2ff;
  --color-blue-ribbon-300: #7cb2ff;
  --color-blue-ribbon-400: #5096ff;
  --color-blue-ribbon-500: #2777ff;
  --color-blue-ribbon-600: #2265eb;
  --color-blue-ribbon-700: #1b51be;
  --color-blue-ribbon-800: #073c8e;
  --color-blue-ribbon-900: #052965;
  --color-blue-ribbon-950: #001646;
}

SCSS

$blue-ribbon: #236af9;
$blue-ribbon-rgb: 35, 106, 249;
$blue-ribbon-light: mix(#fff, $blue-ribbon, 20%);
$blue-ribbon-dark: mix(#000, $blue-ribbon, 20%);

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