#5D9EEA

CSS

:root {
  --blue-bay: #5d9eea;
  --blue-bay-rgb: 93 158 234;
  --blue-bay-oklch: oklch(0.689 0.131 253.5);
}

.element {
  color: var(--blue-bay);
  background-color: hsl(212 77% 64%);
  border-color: oklch(0.689 0.131 253.5);
}

Tailwind CSS v4

@theme {
  --color-blue-bay: #5d9eea;
  --color-blue-bay-50: #ddf8ff;
  --color-blue-bay-100: #cbebff;
  --color-blue-bay-200: #afd7ff;
  --color-blue-bay-300: #8abafa;
  --color-blue-bay-400: #64a2ea;
  --color-blue-bay-500: #3f88da;
  --color-blue-bay-600: #3773b8;
  --color-blue-bay-700: #2c5c94;
  --color-blue-bay-800: #1b446e;
  --color-blue-bay-900: #122f4d;
  --color-blue-bay-950: #041b33;
}

SCSS

$blue-bay: #5d9eea;
$blue-bay-rgb: 93, 158, 234;
$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);
}