#6F9DD8

CSS

:root {
  --blue-bay: #6f9dd8;
  --blue-bay-rgb: 111 157 216;
  --blue-bay-oklch: oklch(0.687 0.101 255.1);
}

.element {
  color: var(--blue-bay);
  background-color: hsl(214 57% 64%);
  border-color: oklch(0.687 0.101 255.1);
}

Tailwind CSS v4

@theme {
  --color-blue-bay: #6f9dd8;
  --color-blue-bay-50: #e3f7ff;
  --color-blue-bay-100: #d3eaff;
  --color-blue-bay-200: #b9d6ff;
  --color-blue-bay-300: #97baeb;
  --color-blue-bay-400: #75a1d9;
  --color-blue-bay-500: #5688c8;
  --color-blue-bay-600: #4a73a9;
  --color-blue-bay-700: #3a5c87;
  --color-blue-bay-800: #284464;
  --color-blue-bay-900: #1b2f47;
  --color-blue-bay-950: #0b1b2e;
}

SCSS

$blue-bay: #6f9dd8;
$blue-bay-rgb: 111, 157, 216;
$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);
}