#6B9CE6

CSS

:root {
  --blue-bay: #6b9ce6;
  --blue-bay-rgb: 107 156 230;
  --blue-bay-oklch: oklch(0.689 0.122 258.4);
}

.element {
  color: var(--blue-bay);
  background-color: hsl(216 71% 66%);
  border-color: oklch(0.689 0.122 258.4);
}

Tailwind CSS v4

@theme {
  --color-blue-bay: #6b9ce6;
  --color-blue-bay-50: #e1f6ff;
  --color-blue-bay-100: #d1e9ff;
  --color-blue-bay-200: #b7d6ff;
  --color-blue-bay-300: #93b8f6;
  --color-blue-bay-400: #719fe6;
  --color-blue-bay-500: #5186d6;
  --color-blue-bay-600: #4571b4;
  --color-blue-bay-700: #375b91;
  --color-blue-bay-800: #25436c;
  --color-blue-bay-900: #182e4c;
  --color-blue-bay-950: #091b32;
}

SCSS

$blue-bay: #6b9ce6;
$blue-bay-rgb: 107, 156, 230;
$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);
}