#647690

CSS

:root {
  --infinity-and-beyond: #647690;
  --infinity-and-beyond-rgb: 100 118 144;
  --infinity-and-beyond-oklch: oklch(0.561 0.046 257.5);
}

.element {
  color: var(--infinity-and-beyond);
  background-color: hsl(215 18% 48%);
  border-color: oklch(0.561 0.046 257.5);
}

Tailwind CSS v4

@theme {
  --color-infinity-and-beyond: #647690;
  --color-infinity-and-beyond-50: #eef6ff;
  --color-infinity-and-beyond-100: #dfe9f8;
  --color-infinity-and-beyond-200: #c9d5e8;
  --color-infinity-and-beyond-300: #aab8cf;
  --color-infinity-and-beyond-400: #8ea0ba;
  --color-infinity-and-beyond-500: #7388a5;
  --color-infinity-and-beyond-600: #62738b;
  --color-infinity-and-beyond-700: #4e5c70;
  --color-infinity-and-beyond-800: #384352;
  --color-infinity-and-beyond-900: #262e39;
  --color-infinity-and-beyond-950: #151b24;
}

SCSS

$infinity-and-beyond: #647690;
$infinity-and-beyond-rgb: 100, 118, 144;
$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);
}