title: Error while accessing members of UIColor extension
body: <p>I want to move custom colors to an extension of UIColor:</p>
  
  <pre><code>extension UIColor {
      static var nonSelectedTabColor: UIColor {
          return UIColor(white: 0.682, alpha: 1) // #AEAEAE
      }
  }
  </code></pre>
  
  <p>But on trying to access it, its causing me an error:</p>
  
  <pre><code>private static let defaultBorderColor = .nonSelectedTabColor
  </code></pre>
  
  <p><code>Reference to member 'nonSelectedTabColor' cannot be resolved without a contextual type</code>.</p>
  
  <p>What is the issue here? How can I fix this?</p>