#6F9CDE

CSS

:root {
  --blue-bay: #6f9cde;
  --blue-bay-rgb: 111 156 222;
  --blue-bay-oklch: oklch(0.688 0.11 257.8);
}

.element {
  color: var(--blue-bay);
  background-color: hsl(216 63% 65%);
  border-color: oklch(0.688 0.11 257.8);
}

Tailwind CSS v4

@theme {
  --color-blue-bay: #6f9cde;
  --color-blue-bay-50: #e3f6ff;
  --color-blue-bay-100: #d3e9ff;
  --color-blue-bay-200: #b9d6ff;
  --color-blue-bay-300: #97b9f0;
  --color-blue-bay-400: #75a0df;
  --color-blue-bay-500: #5687ce;
  --color-blue-bay-600: #4972ae;
  --color-blue-bay-700: #3a5b8c;
  --color-blue-bay-800: #284368;
  --color-blue-bay-900: #1a2e49;
  --color-blue-bay-950: #0b1b30;
}

SCSS

$blue-bay: #6f9cde;
$blue-bay-rgb: 111, 156, 222;
$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);
}