#006FFA

CSS

:root {
  --deep-sky-blue: #006ffa;
  --deep-sky-blue-rgb: 0 111 250;
  --deep-sky-blue-oklch: oklch(0.577 0.224 259.1);
}

.element {
  color: var(--deep-sky-blue);
  background-color: hsl(213 100% 49%);
  border-color: oklch(0.577 0.224 259.1);
}

Tailwind CSS v4

@theme {
  --color-deep-sky-blue: #006ffa;
  --color-deep-sky-blue-50: #d1f7ff;
  --color-deep-sky-blue-100: #bee9ff;
  --color-deep-sky-blue-200: #9dd4ff;
  --color-deep-sky-blue-300: #73b5ff;
  --color-deep-sky-blue-400: #4299ff;
  --color-deep-sky-blue-500: #007aff;
  --color-deep-sky-blue-600: #0168ea;
  --color-deep-sky-blue-700: #0453bd;
  --color-deep-sky-blue-800: #003e8d;
  --color-deep-sky-blue-900: #002b64;
  --color-deep-sky-blue-950: #001745;
}

SCSS

$deep-sky-blue: #006ffa;
$deep-sky-blue-rgb: 0, 111, 250;
$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);
}