#178DF8

CSS

:root {
  --too-blue-to-be-true: #178df8;
  --too-blue-to-be-true-rgb: 23 141 248;
  --too-blue-to-be-true-oklch: oklch(0.64 0.186 252.4);
}

.element {
  color: var(--too-blue-to-be-true);
  background-color: hsl(209 94% 53%);
  border-color: oklch(0.64 0.186 252.4);
}

Tailwind CSS v4

@theme {
  --color-too-blue-to-be-true: #178df8;
  --color-too-blue-to-be-true-50: #d1f9ff;
  --color-too-blue-to-be-true-100: #beecff;
  --color-too-blue-to-be-true-200: #9dd8ff;
  --color-too-blue-to-be-true-300: #71baff;
  --color-too-blue-to-be-true-400: #3da1ff;
  --color-too-blue-to-be-true-500: #0085fb;
  --color-too-blue-to-be-true-600: #0071d4;
  --color-too-blue-to-be-true-700: #005baa;
  --color-too-blue-to-be-true-800: #00437f;
  --color-too-blue-to-be-true-900: #002e5a;
  --color-too-blue-to-be-true-950: #001a3d;
}

SCSS

$too-blue-to-be-true: #178df8;
$too-blue-to-be-true-rgb: 23, 141, 248;
$too-blue-to-be-true-light: mix(#fff, $too-blue-to-be-true, 20%);
$too-blue-to-be-true-dark: mix(#000, $too-blue-to-be-true, 20%);

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