#0C6AFF

CSS

:root {
  --blue-ribbon: #0c6aff;
  --blue-ribbon-rgb: 12 106 255;
  --blue-ribbon-oklch: oklch(0.572 0.235 260.8);
}

.element {
  color: var(--blue-ribbon);
  background-color: hsl(217 100% 52%);
  border-color: oklch(0.572 0.235 260.8);
}

Tailwind CSS v4

@theme {
  --color-blue-ribbon: #0c6aff;
  --color-blue-ribbon-50: #d1f6ff;
  --color-blue-ribbon-100: #bee8ff;
  --color-blue-ribbon-200: #9ed3ff;
  --color-blue-ribbon-300: #75b3ff;
  --color-blue-ribbon-400: #4496ff;
  --color-blue-ribbon-500: #0976ff;
  --color-blue-ribbon-600: #0e65f1;
  --color-blue-ribbon-700: #0c51c2;
  --color-blue-ribbon-800: #003c91;
  --color-blue-ribbon-900: #002967;
  --color-blue-ribbon-950: #001647;
}

SCSS

$blue-ribbon: #0c6aff;
$blue-ribbon-rgb: 12, 106, 255;
$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);
}