#2CA4E3

CSS

:root {
  --high-blue: #2ca4e3;
  --high-blue-rgb: 44 164 227;
  --high-blue-oklch: oklch(0.683 0.137 237.6);
}

.element {
  color: var(--high-blue);
  background-color: hsl(201 77% 53%);
  border-color: oklch(0.683 0.137 237.6);
}

Tailwind CSS v4

@theme {
  --color-high-blue: #2ca4e3;
  --color-high-blue-50: #d2fbff;
  --color-high-blue-100: #bfefff;
  --color-high-blue-200: #9eddff;
  --color-high-blue-300: #71c1f6;
  --color-high-blue-400: #3ea9e5;
  --color-high-blue-500: #0090d5;
  --color-high-blue-600: #007ab4;
  --color-high-blue-700: #006290;
  --color-high-blue-800: #00486b;
  --color-high-blue-900: #00324b;
  --color-high-blue-950: #001e31;
}

SCSS

$high-blue: #2ca4e3;
$high-blue-rgb: 44, 164, 227;
$high-blue-light: mix(#fff, $high-blue, 20%);
$high-blue-dark: mix(#000, $high-blue, 20%);

.element {
  color: $high-blue;
  box-shadow: 0 0 0 2px rgba($high-blue, 0.35);
}