#709CE1

CSS

:root {
  --blue-bay: #709ce1;
  --blue-bay-rgb: 112 156 225;
  --blue-bay-oklch: oklch(0.69 0.113 259.1);
}

.element {
  color: var(--blue-bay);
  background-color: hsl(217 65% 66%);
  border-color: oklch(0.69 0.113 259.1);
}

Tailwind CSS v4

@theme {
  --color-blue-bay: #709ce1;
  --color-blue-bay-50: #e3f6ff;
  --color-blue-bay-100: #d3e9ff;
  --color-blue-bay-200: #b9d5ff;
  --color-blue-bay-300: #97b8f2;
  --color-blue-bay-400: #759fe1;
  --color-blue-bay-500: #5786d0;
  --color-blue-bay-600: #4a72b0;
  --color-blue-bay-700: #3b5b8d;
  --color-blue-bay-800: #284369;
  --color-blue-bay-900: #1b2e4a;
  --color-blue-bay-950: #0b1b31;
}

SCSS

$blue-bay: #709ce1;
$blue-bay-rgb: 112, 156, 225;
$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);
}