title: Kivy - Change the color of a button after being pressed?
body: <p>I have two buttons on my application, and they are both purple with white text. When the button is pressed, I wanted the color to change to a dark purple. Clearly there is something simple I am missing, as my code doesn't work like I would expect it to.</p>
  
  <pre><code>       Button:
              background_normal: ''
              background_color: utils.get_color_from_hex("#752db5")
              text: 'Sign Up'
              size_hint: .3, .3
              padding: 3, 1
              font_name: 'Roboto-Medium'
              background_color_down: utils.get_color_from_hex("#5b238d")  
  </code></pre>