#467BA7

CSS

:root {
  --zenith: #467ba7;
  --zenith-rgb: 70 123 167;
  --zenith-oklch: oklch(0.565 0.089 245.3);
}

.element {
  color: var(--zenith);
  background-color: hsl(207 41% 46%);
  border-color: oklch(0.565 0.089 245.3);
}

Tailwind CSS v4

@theme {
  --color-zenith: #467ba7;
  --color-zenith-50: #e2f8ff;
  --color-zenith-100: #d1ebff;
  --color-zenith-200: #b7d9f9;
  --color-zenith-300: #93bce3;
  --color-zenith-400: #71a4d0;
  --color-zenith-500: #508cbd;
  --color-zenith-600: #4576a0;
  --color-zenith-700: #375f80;
  --color-zenith-800: #25465f;
  --color-zenith-900: #193042;
  --color-zenith-950: #091c2b;
}

SCSS

$zenith: #467ba7;
$zenith-rgb: 70, 123, 167;
$zenith-light: mix(#fff, $zenith, 20%);
$zenith-dark: mix(#000, $zenith, 20%);

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