#66788F

CSS

:root {
  --infinity-and-beyond: #66788f;
  --infinity-and-beyond-rgb: 102 120 143;
  --infinity-and-beyond-oklch: oklch(0.567 0.042 254.7);
}

.element {
  color: var(--infinity-and-beyond);
  background-color: hsl(214 17% 48%);
  border-color: oklch(0.567 0.042 254.7);
}

Tailwind CSS v4

@theme {
  --color-infinity-and-beyond: #66788f;
  --color-infinity-and-beyond-50: #eef6ff;
  --color-infinity-and-beyond-100: #dfe9f6;
  --color-infinity-and-beyond-200: #c9d5e6;
  --color-infinity-and-beyond-300: #aab9cd;
  --color-infinity-and-beyond-400: #8ea0b7;
  --color-infinity-and-beyond-500: #7488a2;
  --color-infinity-and-beyond-600: #627389;
  --color-infinity-and-beyond-700: #4e5c6e;
  --color-infinity-and-beyond-800: #384351;
  --color-infinity-and-beyond-900: #262f38;
  --color-infinity-and-beyond-950: #151b23;
}

SCSS

$infinity-and-beyond: #66788f;
$infinity-and-beyond-rgb: 102, 120, 143;
$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);
}