#6B9CE7

CSS

:root {
  --blue-bay: #6b9ce7;
  --blue-bay-rgb: 107 156 231;
  --blue-bay-oklch: oklch(0.69 0.123 258.7);
}

.element {
  color: var(--blue-bay);
  background-color: hsl(216 72% 66%);
  border-color: oklch(0.69 0.123 258.7);
}

Tailwind CSS v4

@theme {
  --color-blue-bay: #6b9ce7;
  --color-blue-bay-50: #e1f6ff;
  --color-blue-bay-100: #d1e9ff;
  --color-blue-bay-200: #b6d6ff;
  --color-blue-bay-300: #93b8f7;
  --color-blue-bay-400: #719fe7;
  --color-blue-bay-500: #5186d7;
  --color-blue-bay-600: #4571b5;
  --color-blue-bay-700: #375b91;
  --color-blue-bay-800: #24436c;
  --color-blue-bay-900: #182e4c;
  --color-blue-bay-950: #091b32;
}

SCSS

$blue-bay: #6b9ce7;
$blue-bay-rgb: 107, 156, 231;
$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);
}