#40A3DD

CSS

:root {
  --high-blue: #40a3dd;
  --high-blue-rgb: 64 163 221;
  --high-blue-oklch: oklch(0.683 0.125 238.4);
}

.element {
  color: var(--high-blue);
  background-color: hsl(202 70% 56%);
  border-color: oklch(0.683 0.125 238.4);
}

Tailwind CSS v4

@theme {
  --color-high-blue: #40a3dd;
  --color-high-blue-50: #d6fbff;
  --color-high-blue-100: #c3eeff;
  --color-high-blue-200: #a4dcff;
  --color-high-blue-300: #7ac0f1;
  --color-high-blue-400: #4da8df;
  --color-high-blue-500: #0590cf;
  --color-high-blue-600: #0f7aae;
  --color-high-blue-700: #0e618c;
  --color-high-blue-800: #024868;
  --color-high-blue-900: #033249;
  --color-high-blue-950: #001e30;
}

SCSS

$high-blue: #40a3dd;
$high-blue-rgb: 64, 163, 221;
$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);
}