#709CDD

CSS

:root {
  --blue-bay: #709cdd;
  --blue-bay-rgb: 112 156 221;
  --blue-bay-oklch: oklch(0.688 0.108 258);
}

.element {
  color: var(--blue-bay);
  background-color: hsl(216 62% 65%);
  border-color: oklch(0.688 0.108 258);
}

Tailwind CSS v4

@theme {
  --color-blue-bay: #709cdd;
  --color-blue-bay-50: #e4f6ff;
  --color-blue-bay-100: #d3e9ff;
  --color-blue-bay-200: #bad6ff;
  --color-blue-bay-300: #97b9ef;
  --color-blue-bay-400: #76a0de;
  --color-blue-bay-500: #5787cd;
  --color-blue-bay-600: #4a72ad;
  --color-blue-bay-700: #3b5b8b;
  --color-blue-bay-800: #284367;
  --color-blue-bay-900: #1b2e48;
  --color-blue-bay-950: #0b1b2f;
}

SCSS

$blue-bay: #709cdd;
$blue-bay-rgb: 112, 156, 221;
$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);
}