title: How to get current color from Linear Gradient?
body: <p>I have an Seek Bar whose values ranges from 1 to 10. The THUMB stops at 1,2,3,4,5 ... 10.</p>
  
  <p>The background color if SeekBar is Linear Gradient [Colors Start from RED, then YELLOW and lastly GREEN].  How to get the current color where thumb is positioned?</p>