#1370E8

CSS

:root {
  --deep-sky-blue: #1370e8;
  --deep-sky-blue-rgb: 19 112 232;
  --deep-sky-blue-oklch: oklch(0.566 0.199 258);
}

.element {
  color: var(--deep-sky-blue);
  background-color: hsl(214 85% 49%);
  border-color: oklch(0.566 0.199 258);
}

Tailwind CSS v4

@theme {
  --color-deep-sky-blue: #1370e8;
  --color-deep-sky-blue-50: #d4f7ff;
  --color-deep-sky-blue-100: #c1eaff;
  --color-deep-sky-blue-200: #a2d5ff;
  --color-deep-sky-blue-300: #79b7ff;
  --color-deep-sky-blue-400: #4b9cff;
  --color-deep-sky-blue-500: #167fff;
  --color-deep-sky-blue-600: #176cdd;
  --color-deep-sky-blue-700: #1256b2;
  --color-deep-sky-blue-800: #014085;
  --color-deep-sky-blue-900: #022c5e;
  --color-deep-sky-blue-950: #001840;
}

SCSS

$deep-sky-blue: #1370e8;
$deep-sky-blue-rgb: 19, 112, 232;
$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);
}