#5D9EE9

CSS

:root {
  --blue-bay: #5d9ee9;
  --blue-bay-rgb: 93 158 233;
  --blue-bay-oklch: oklch(0.688 0.13 253.2);
}

.element {
  color: var(--blue-bay);
  background-color: hsl(212 76% 64%);
  border-color: oklch(0.688 0.13 253.2);
}

Tailwind CSS v4

@theme {
  --color-blue-bay: #5d9ee9;
  --color-blue-bay-50: #ddf8ff;
  --color-blue-bay-100: #cbebff;
  --color-blue-bay-200: #afd7ff;
  --color-blue-bay-300: #8abaf9;
  --color-blue-bay-400: #64a2e9;
  --color-blue-bay-500: #3f88d9;
  --color-blue-bay-600: #3773b7;
  --color-blue-bay-700: #2c5c93;
  --color-blue-bay-800: #1b446d;
  --color-blue-bay-900: #122f4d;
  --color-blue-bay-950: #041b33;
}

SCSS

$blue-bay: #5d9ee9;
$blue-bay-rgb: 93, 158, 233;
$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);
}