#005B93

CSS

:root {
  --hyper-blue: #005b93;
  --hyper-blue-rgb: 0 91 147;
  --hyper-blue-oklch: oklch(0.456 0.116 245.6);
}

.element {
  color: var(--hyper-blue);
  background-color: hsl(203 100% 29%);
  border-color: oklch(0.456 0.116 245.6);
}

Tailwind CSS v4

@theme {
  --color-hyper-blue: #005b93;
  --color-hyper-blue-50: #dcf9ff;
  --color-hyper-blue-100: #caecff;
  --color-hyper-blue-200: #add9ff;
  --color-hyper-blue-300: #87bdf0;
  --color-hyper-blue-400: #60a5df;
  --color-hyper-blue-500: #388cce;
  --color-hyper-blue-600: #3177ae;
  --color-hyper-blue-700: #275f8c;
  --color-hyper-blue-800: #184667;
  --color-hyper-blue-900: #0f3149;
  --color-hyper-blue-950: #021c30;
}

SCSS

$hyper-blue: #005b93;
$hyper-blue-rgb: 0, 91, 147;
$hyper-blue-light: mix(#fff, $hyper-blue, 20%);
$hyper-blue-dark: mix(#000, $hyper-blue, 20%);

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