#2C70ED

CSS

:root {
  --deep-sky-blue: #2c70ed;
  --deep-sky-blue-rgb: 44 112 237;
  --deep-sky-blue-oklch: oklch(0.575 0.201 261.3);
}

.element {
  color: var(--deep-sky-blue);
  background-color: hsl(219 84% 55%);
  border-color: oklch(0.575 0.201 261.3);
}

Tailwind CSS v4

@theme {
  --color-deep-sky-blue: #2c70ed;
  --color-deep-sky-blue-50: #d7f6ff;
  --color-deep-sky-blue-100: #c5e8ff;
  --color-deep-sky-blue-200: #a7d3ff;
  --color-deep-sky-blue-300: #80b4ff;
  --color-deep-sky-blue-400: #5799ff;
  --color-deep-sky-blue-500: #2f7cff;
  --color-deep-sky-blue-600: #2969df;
  --color-deep-sky-blue-700: #2154b3;
  --color-deep-sky-blue-800: #0f3e86;
  --color-deep-sky-blue-900: #092b5f;
  --color-deep-sky-blue-950: #001741;
}

SCSS

$deep-sky-blue: #2c70ed;
$deep-sky-blue-rgb: 44, 112, 237;
$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);
}