title: Can't change color of buttons without changing colorPrimery, kotlin - android
body: <p>I'm new android developer. I am trying to change the background of button and set the black color on it. (the color of button is purple)
  I wrote this code on a body of button in main activity:</p>
  <p>android:background=&quot;@color/black&quot;</p>
  <p>color &quot;black&quot; has defined in colors.xml:</p>
  <p>#FF000000</p>
  <p>but color of my button is still purple (it's not black)
  I found this purple color in &quot;themes&quot; named &quot;colorPrimary&quot;.
  when I change the &quot;colorPrimary&quot; to black, the color of button changed but the problem is that &quot;colorPrimary&quot; applies to all buttons and I can't have two button with diferent colors in my app :(</p>
  <p>how can I change the color of buttons without changing color primary?
  how can I have two different buttons with different colors?</p>