#0072FF

CSS

:root {
  --deep-sky-blue: #0072ff;
  --deep-sky-blue-rgb: 0 114 255;
  --deep-sky-blue-oklch: oklch(0.587 0.227 259);
}

.element {
  color: var(--deep-sky-blue);
  background-color: hsl(213 100% 50%);
  border-color: oklch(0.587 0.227 259);
}

Tailwind CSS v4

@theme {
  --color-deep-sky-blue: #0072ff;
  --color-deep-sky-blue-50: #d1f7ff;
  --color-deep-sky-blue-100: #bde9ff;
  --color-deep-sky-blue-200: #9cd4ff;
  --color-deep-sky-blue-300: #72b4ff;
  --color-deep-sky-blue-400: #3f99ff;
  --color-deep-sky-blue-500: #007aff;
  --color-deep-sky-blue-600: #0068ec;
  --color-deep-sky-blue-700: #0053be;
  --color-deep-sky-blue-800: #003d8e;
  --color-deep-sky-blue-900: #002a65;
  --color-deep-sky-blue-950: #001746;
}

SCSS

$deep-sky-blue: #0072ff;
$deep-sky-blue-rgb: 0, 114, 255;
$deep-sky-blue-light: mix(#fff, $deep-sky-blue, 20%);
$deep-sky-blue-dark: mix(#000, $deep-sky-blue, 20%);

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