#6E9BE7

CSS

:root {
  --blue-bay: #6e9be7;
  --blue-bay-rgb: 110 155 231;
  --blue-bay-oklch: oklch(0.689 0.123 260.4);
}

.element {
  color: var(--blue-bay);
  background-color: hsl(218 72% 67%);
  border-color: oklch(0.689 0.123 260.4);
}

Tailwind CSS v4

@theme {
  --color-blue-bay: #6e9be7;
  --color-blue-bay-50: #e2f6ff;
  --color-blue-bay-100: #d2e9ff;
  --color-blue-bay-200: #b8d5ff;
  --color-blue-bay-300: #95b8f7;
  --color-blue-bay-400: #749fe7;
  --color-blue-bay-500: #5585d7;
  --color-blue-bay-600: #4871b5;
  --color-blue-bay-700: #395a92;
  --color-blue-bay-800: #26426c;
  --color-blue-bay-900: #1a2e4c;
  --color-blue-bay-950: #0a1a32;
}

SCSS

$blue-bay: #6e9be7;
$blue-bay-rgb: 110, 155, 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);
}