#176FF8

CSS

:root {
  --deep-sky-blue: #176ff8;
  --deep-sky-blue-rgb: 23 111 248;
  --deep-sky-blue-oklch: oklch(0.577 0.22 260.1);
}

.element {
  color: var(--deep-sky-blue);
  background-color: hsl(217 94% 53%);
  border-color: oklch(0.577 0.22 260.1);
}

Tailwind CSS v4

@theme {
  --color-deep-sky-blue: #176ff8;
  --color-deep-sky-blue-50: #d3f6ff;
  --color-deep-sky-blue-100: #c0e9ff;
  --color-deep-sky-blue-200: #a0d4ff;
  --color-deep-sky-blue-300: #78b4ff;
  --color-deep-sky-blue-400: #4999ff;
  --color-deep-sky-blue-500: #147aff;
  --color-deep-sky-blue-600: #1568e8;
  --color-deep-sky-blue-700: #1153bb;
  --color-deep-sky-blue-800: #003d8c;
  --color-deep-sky-blue-900: #012a63;
  --color-deep-sky-blue-950: #001744;
}

SCSS

$deep-sky-blue: #176ff8;
$deep-sky-blue-rgb: 23, 111, 248;
$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);
}