#0070F7

CSS

:root {
  --deep-sky-blue: #0070f7;
  --deep-sky-blue-rgb: 0 112 247;
  --deep-sky-blue-oklch: oklch(0.576 0.219 258.6);
}

.element {
  color: var(--deep-sky-blue);
  background-color: hsl(213 100% 48%);
  border-color: oklch(0.576 0.219 258.6);
}

Tailwind CSS v4

@theme {
  --color-deep-sky-blue: #0070f7;
  --color-deep-sky-blue-50: #d1f7ff;
  --color-deep-sky-blue-100: #bee9ff;
  --color-deep-sky-blue-200: #9ed4ff;
  --color-deep-sky-blue-300: #74b5ff;
  --color-deep-sky-blue-400: #429aff;
  --color-deep-sky-blue-500: #007bff;
  --color-deep-sky-blue-600: #0269e8;
  --color-deep-sky-blue-700: #0454ba;
  --color-deep-sky-blue-800: #003e8c;
  --color-deep-sky-blue-900: #002b63;
  --color-deep-sky-blue-950: #001744;
}

SCSS

$deep-sky-blue: #0070f7;
$deep-sky-blue-rgb: 0, 112, 247;
$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);
}