#657890

CSS

:root {
  --infinity-and-beyond: #657890;
  --infinity-and-beyond-rgb: 101 120 144;
  --infinity-and-beyond-oklch: oklch(0.566 0.044 254.4);
}

.element {
  color: var(--infinity-and-beyond);
  background-color: hsl(213 18% 48%);
  border-color: oklch(0.566 0.044 254.4);
}

Tailwind CSS v4

@theme {
  --color-infinity-and-beyond: #657890;
  --color-infinity-and-beyond-50: #edf6ff;
  --color-infinity-and-beyond-100: #dfe9f7;
  --color-infinity-and-beyond-200: #c9d5e7;
  --color-infinity-and-beyond-300: #a9b9ce;
  --color-infinity-and-beyond-400: #8da0b8;
  --color-infinity-and-beyond-500: #7388a3;
  --color-infinity-and-beyond-600: #61738a;
  --color-infinity-and-beyond-700: #4e5c6e;
  --color-infinity-and-beyond-800: #384451;
  --color-infinity-and-beyond-900: #262f39;
  --color-infinity-and-beyond-950: #141b23;
}

SCSS

$infinity-and-beyond: #657890;
$infinity-and-beyond-rgb: 101, 120, 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);
}