#0073E9

CSS

:root {
  --deep-sky-blue: #0073e9;
  --deep-sky-blue-rgb: 0 115 233;
  --deep-sky-blue-oklch: oklch(0.572 0.199 256.4);
}

.element {
  color: var(--deep-sky-blue);
  background-color: hsl(210 100% 46%);
  border-color: oklch(0.572 0.199 256.4);
}

Tailwind CSS v4

@theme {
  --color-deep-sky-blue: #0073e9;
  --color-deep-sky-blue-50: #d3f7ff;
  --color-deep-sky-blue-100: #bfeaff;
  --color-deep-sky-blue-200: #9fd6ff;
  --color-deep-sky-blue-300: #76b8ff;
  --color-deep-sky-blue-400: #459dff;
  --color-deep-sky-blue-500: #0080ff;
  --color-deep-sky-blue-600: #056ddc;
  --color-deep-sky-blue-700: #0757b1;
  --color-deep-sky-blue-800: #004184;
  --color-deep-sky-blue-900: #002d5e;
  --color-deep-sky-blue-950: #001940;
}

SCSS

$deep-sky-blue: #0073e9;
$deep-sky-blue-rgb: 0, 115, 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);
}