#719BE2

CSS

:root {
  --blue-bay: #719be2;
  --blue-bay-rgb: 113 155 226;
  --blue-bay-oklch: oklch(0.689 0.115 260.5);
}

.element {
  color: var(--blue-bay);
  background-color: hsl(218 66% 66%);
  border-color: oklch(0.689 0.115 260.5);
}

Tailwind CSS v4

@theme {
  --color-blue-bay: #719be2;
  --color-blue-bay-50: #e4f6ff;
  --color-blue-bay-100: #d4e9ff;
  --color-blue-bay-200: #bad5ff;
  --color-blue-bay-300: #98b8f3;
  --color-blue-bay-400: #779fe2;
  --color-blue-bay-500: #5885d2;
  --color-blue-bay-600: #4b71b1;
  --color-blue-bay-700: #3c5a8e;
  --color-blue-bay-800: #29426a;
  --color-blue-bay-900: #1b2e4a;
  --color-blue-bay-950: #0c1a31;
}

SCSS

$blue-bay: #719be2;
$blue-bay-rgb: 113, 155, 226;
$blue-bay-light: mix(#fff, $blue-bay, 20%);
$blue-bay-dark: mix(#000, $blue-bay, 20%);

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