#1170E9

CSS

:root {
  --deep-sky-blue: #1170e9;
  --deep-sky-blue-rgb: 17 112 233;
  --deep-sky-blue-oklch: oklch(0.567 0.201 258);
}

.element {
  color: var(--deep-sky-blue);
  background-color: hsl(214 86% 49%);
  border-color: oklch(0.567 0.201 258);
}

Tailwind CSS v4

@theme {
  --color-deep-sky-blue: #1170e9;
  --color-deep-sky-blue-50: #d4f7ff;
  --color-deep-sky-blue-100: #c1eaff;
  --color-deep-sky-blue-200: #a1d5ff;
  --color-deep-sky-blue-300: #79b6ff;
  --color-deep-sky-blue-400: #4a9cff;
  --color-deep-sky-blue-500: #137fff;
  --color-deep-sky-blue-600: #156cde;
  --color-deep-sky-blue-700: #1156b2;
  --color-deep-sky-blue-800: #004085;
  --color-deep-sky-blue-900: #012c5e;
  --color-deep-sky-blue-950: #001841;
}

SCSS

$deep-sky-blue: #1170e9;
$deep-sky-blue-rgb: 17, 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);
}