#0570E9

CSS

:root {
  --deep-sky-blue: #0570e9;
  --deep-sky-blue-rgb: 5 112 233;
  --deep-sky-blue-oklch: oklch(0.566 0.202 257.4);
}

.element {
  color: var(--deep-sky-blue);
  background-color: hsl(212 96% 47%);
  border-color: oklch(0.566 0.202 257.4);
}

Tailwind CSS v4

@theme {
  --color-deep-sky-blue: #0570e9;
  --color-deep-sky-blue-50: #d3f7ff;
  --color-deep-sky-blue-100: #c0eaff;
  --color-deep-sky-blue-200: #a0d5ff;
  --color-deep-sky-blue-300: #77b7ff;
  --color-deep-sky-blue-400: #479cff;
  --color-deep-sky-blue-500: #057fff;
  --color-deep-sky-blue-600: #0d6cde;
  --color-deep-sky-blue-700: #0c57b3;
  --color-deep-sky-blue-800: #004086;
  --color-deep-sky-blue-900: #002c5f;
  --color-deep-sky-blue-950: #001841;
}

SCSS

$deep-sky-blue: #0570e9;
$deep-sky-blue-rgb: 5, 112, 233;
$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);
}