#6D9DDA

CSS

:root {
  --blue-bay: #6d9dda;
  --blue-bay-rgb: 109 157 218;
  --blue-bay-oklch: oklch(0.687 0.104 254.9);
}

.element {
  color: var(--blue-bay);
  background-color: hsl(214 60% 64%);
  border-color: oklch(0.687 0.104 254.9);
}

Tailwind CSS v4

@theme {
  --color-blue-bay: #6d9dda;
  --color-blue-bay-50: #e3f7ff;
  --color-blue-bay-100: #d2eaff;
  --color-blue-bay-200: #b8d7ff;
  --color-blue-bay-300: #95baed;
  --color-blue-bay-400: #74a1db;
  --color-blue-bay-500: #5488ca;
  --color-blue-bay-600: #4873aa;
  --color-blue-bay-700: #395c89;
  --color-blue-bay-800: #274466;
  --color-blue-bay-900: #1a2f47;
  --color-blue-bay-950: #0a1b2f;
}

SCSS

$blue-bay: #6d9dda;
$blue-bay-rgb: 109, 157, 218;
$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);
}