title: Change Vue prototype variable in all components
body: <p>I'm wanting to change the global variable below throughout the page</p>
  
  <pre><code>Vue.prototype.$color = 'green';
  </code></pre>
  
  <p>I tried using the code below but it only changes within the component I created</p>
  
  <pre><code>watch: {
     cor(newValue, oldVlue) {
         this.$color = newValue;
     }
  }
  </code></pre>
  
  <p>is it possible for me to create a way to change the prototype variable across all components of the page?</p>