title: What are the .primary and .secondary colors in SwiftUI?
body: <p>In the new SwiftUI, the type <code>Color</code> is very similar to <code>UIColor</code> from <code>UIKit</code>.</p>
  <p>There are the common colors, as expected, but there is the addition of two other colors that I noticed:</p>
  <ul>
  <li><code>.primary</code></li>
  <li><code>.secondary</code></li>
  </ul>
  <p>There is nothing in the Apple Documentation for the descriptions of the different <a href="https://developer.apple.com/documentation/swiftui/color" rel="noreferrer"><code>Color</code></a>s.</p>
  <ul>
  <li><strong>What are these colors?</strong></li>
  <li><strong>Which one should I use for certain things?</strong></li>
  </ul>