Blinking Blue

CSS

:root {
  --blinking-blue: #0033ff;
  --blinking-blue-rgb: 0 51 255;
  --blinking-blue-oklch: oklch(0.485 0.291 264.1);
}

.element {
  color: var(--blinking-blue);
  background-color: hsl(228 100% 50%);
  border-color: oklch(0.485 0.291 264.1);
}

Tailwind CSS v4

@theme {
  --color-blinking-blue: #0033ff;
  --color-blinking-blue-50: #cef4ff;
  --color-blinking-blue-100: #bae5ff;
  --color-blinking-blue-200: #9aceff;
  --color-blinking-blue-300: #71abff;
  --color-blinking-blue-400: #418aff;
  --color-blinking-blue-500: #1762ff;
  --color-blinking-blue-600: #1554ff;
  --color-blinking-blue-700: #1044da;
  --color-blinking-blue-800: #0032a4;
  --color-blinking-blue-900: #002375;
  --color-blinking-blue-950: #000f52;
}

SCSS

$blinking-blue: #0033ff;
$blinking-blue-rgb: 0, 51, 255;
$blinking-blue-light: mix(#fff, $blinking-blue, 20%);
$blinking-blue-dark: mix(#000, $blinking-blue, 20%);

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