#0056A3

CSS

:root {
  --blue-chip: #0056a3;
  --blue-chip-rgb: 0 86 163;
  --blue-chip-oklch: oklch(0.455 0.143 253.5);
}

.element {
  color: var(--blue-chip);
  background-color: hsl(208 100% 32%);
  border-color: oklch(0.455 0.143 253.5);
}

Tailwind CSS v4

@theme {
  --color-blue-chip: #0056a3;
  --color-blue-chip-50: #dbf8ff;
  --color-blue-chip-100: #c9ebff;
  --color-blue-chip-200: #acd7ff;
  --color-blue-chip-300: #85baff;
  --color-blue-chip-400: #5ea1f0;
  --color-blue-chip-500: #3687e1;
  --color-blue-chip-600: #2f73be;
  --color-blue-chip-700: #265c99;
  --color-blue-chip-800: #164472;
  --color-blue-chip-900: #0e2f50;
  --color-blue-chip-950: #021b35;
}

SCSS

$blue-chip: #0056a3;
$blue-chip-rgb: 0, 86, 163;
$blue-chip-light: mix(#fff, $blue-chip, 20%);
$blue-chip-dark: mix(#000, $blue-chip, 20%);

.element {
  color: $blue-chip;
  box-shadow: 0 0 0 2px rgba($blue-chip, 0.35);
}