#699EDD

CSS

:root {
  --blue-bay: #699edd;
  --blue-bay-rgb: 105 158 221;
  --blue-bay-oklch: oklch(0.688 0.109 253.5);
}

.element {
  color: var(--blue-bay);
  background-color: hsl(213 63% 64%);
  border-color: oklch(0.688 0.109 253.5);
}

Tailwind CSS v4

@theme {
  --color-blue-bay: #699edd;
  --color-blue-bay-50: #e1f7ff;
  --color-blue-bay-100: #d0eaff;
  --color-blue-bay-200: #b6d7ff;
  --color-blue-bay-300: #92baef;
  --color-blue-bay-400: #6fa2de;
  --color-blue-bay-500: #4f89cd;
  --color-blue-bay-600: #4374ad;
  --color-blue-bay-700: #355d8b;
  --color-blue-bay-800: #244467;
  --color-blue-bay-900: #182f48;
  --color-blue-bay-950: #081b2f;
}

SCSS

$blue-bay: #699edd;
$blue-bay-rgb: 105, 158, 221;
$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);
}