#0091FF

CSS

:root {
  --too-blue-to-be-true: #0091ff;
  --too-blue-to-be-true-rgb: 0 145 255;
  --too-blue-to-be-true-oklch: oklch(0.651 0.192 251.5);
}

.element {
  color: var(--too-blue-to-be-true);
  background-color: hsl(206 100% 50%);
  border-color: oklch(0.651 0.192 251.5);
}

Tailwind CSS v4

@theme {
  --color-too-blue-to-be-true: #0091ff;
  --color-too-blue-to-be-true-50: #cff9ff;
  --color-too-blue-to-be-true-100: #bbecff;
  --color-too-blue-to-be-true-200: #99d9ff;
  --color-too-blue-to-be-true-300: #6cbbff;
  --color-too-blue-to-be-true-400: #32a1ff;
  --color-too-blue-to-be-true-500: #0085ff;
  --color-too-blue-to-be-true-600: #0071d7;
  --color-too-blue-to-be-true-700: #005bad;
  --color-too-blue-to-be-true-800: #004381;
  --color-too-blue-to-be-true-900: #002f5b;
  --color-too-blue-to-be-true-950: #001a3e;
}

SCSS

$too-blue-to-be-true: #0091ff;
$too-blue-to-be-true-rgb: 0, 145, 255;
$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);
}