#2E71EA

CSS

:root {
  --deep-sky-blue: #2e71ea;
  --deep-sky-blue-rgb: 46 113 234;
  --deep-sky-blue-oklch: oklch(0.576 0.196 261.1);
}

.element {
  color: var(--deep-sky-blue);
  background-color: hsl(219 82% 55%);
  border-color: oklch(0.576 0.196 261.1);
}

Tailwind CSS v4

@theme {
  --color-deep-sky-blue: #2e71ea;
  --color-deep-sky-blue-50: #d8f6ff;
  --color-deep-sky-blue-100: #c6e8ff;
  --color-deep-sky-blue-200: #a8d4ff;
  --color-deep-sky-blue-300: #82b5ff;
  --color-deep-sky-blue-400: #589aff;
  --color-deep-sky-blue-500: #317dff;
  --color-deep-sky-blue-600: #2b6adc;
  --color-deep-sky-blue-700: #2255b1;
  --color-deep-sky-blue-800: #103f84;
  --color-deep-sky-blue-900: #0a2b5e;
  --color-deep-sky-blue-950: #011840;
}

SCSS

$deep-sky-blue: #2e71ea;
$deep-sky-blue-rgb: 46, 113, 234;
$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);
}