#174ECC

CSS

:root {
  --flying-fish-blue: #174ecc;
  --flying-fish-blue-rgb: 23 78 204;
  --flying-fish-blue-oklch: oklch(0.476 0.203 263.1);
}

.element {
  color: var(--flying-fish-blue);
  background-color: hsl(222 80% 45%);
  border-color: oklch(0.476 0.203 263.1);
}

Tailwind CSS v4

@theme {
  --color-flying-fish-blue: #174ecc;
  --color-flying-fish-blue-50: #d9f5ff;
  --color-flying-fish-blue-100: #c7e7ff;
  --color-flying-fish-blue-200: #aad2ff;
  --color-flying-fish-blue-300: #84b3ff;
  --color-flying-fish-blue-400: #5c98ff;
  --color-flying-fish-blue-500: #387aff;
  --color-flying-fish-blue-600: #3168e0;
  --color-flying-fish-blue-700: #2653b4;
  --color-flying-fish-blue-800: #143d87;
  --color-flying-fish-blue-900: #0d2a60;
  --color-flying-fish-blue-950: #021742;
}

SCSS

$flying-fish-blue: #174ecc;
$flying-fish-blue-rgb: 23, 78, 204;
$flying-fish-blue-light: mix(#fff, $flying-fish-blue, 20%);
$flying-fish-blue-dark: mix(#000, $flying-fish-blue, 20%);

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