Iridescent Blue

CSS

:root {
  --iridescent-blue: #0153c8;
  --iridescent-blue-rgb: 1 83 200;
  --iridescent-blue-oklch: oklch(0.479 0.195 260);
}

.element {
  color: var(--iridescent-blue);
  background-color: hsl(215 99% 39%);
  border-color: oklch(0.479 0.195 260);
}

Tailwind CSS v4

@theme {
  --color-iridescent-blue: #0153c8;
  --color-iridescent-blue-50: #d7f6ff;
  --color-iridescent-blue-100: #c5e9ff;
  --color-iridescent-blue-200: #a6d4ff;
  --color-iridescent-blue-300: #7fb5ff;
  --color-iridescent-blue-400: #559bff;
  --color-iridescent-blue-500: #2b7eff;
  --color-iridescent-blue-600: #276bdb;
  --color-iridescent-blue-700: #1f56b0;
  --color-iridescent-blue-800: #0d3f84;
  --color-iridescent-blue-900: #082c5d;
  --color-iridescent-blue-950: #001840;
}

SCSS

$iridescent-blue: #0153c8;
$iridescent-blue-rgb: 1, 83, 200;
$iridescent-blue-light: mix(#fff, $iridescent-blue, 20%);
$iridescent-blue-dark: mix(#000, $iridescent-blue, 20%);

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