#677791

CSS

:root {
  --infinity-and-beyond: #677791;
  --infinity-and-beyond-rgb: 103 119 145;
  --infinity-and-beyond-oklch: oklch(0.566 0.045 260.1);
}

.element {
  color: var(--infinity-and-beyond);
  background-color: hsl(217 17% 49%);
  border-color: oklch(0.566 0.045 260.1);
}

Tailwind CSS v4

@theme {
  --color-infinity-and-beyond: #677791;
  --color-infinity-and-beyond-50: #eef6ff;
  --color-infinity-and-beyond-100: #e0e8f7;
  --color-infinity-and-beyond-200: #cad5e8;
  --color-infinity-and-beyond-300: #abb8cf;
  --color-infinity-and-beyond-400: #8f9fb9;
  --color-infinity-and-beyond-500: #7587a4;
  --color-infinity-and-beyond-600: #63728b;
  --color-infinity-and-beyond-700: #4f5b6f;
  --color-infinity-and-beyond-800: #394352;
  --color-infinity-and-beyond-900: #272e39;
  --color-infinity-and-beyond-950: #151b23;
}

SCSS

$infinity-and-beyond: #677791;
$infinity-and-beyond-rgb: 103, 119, 145;
$infinity-and-beyond-light: mix(#fff, $infinity-and-beyond, 20%);
$infinity-and-beyond-dark: mix(#000, $infinity-and-beyond, 20%);

.element {
  color: $infinity-and-beyond;
  box-shadow: 0 0 0 2px rgba($infinity-and-beyond, 0.35);
}