title: SeekBar's thumb color is quite blurry
body: <p>I have a seekbar whichs thumb's color is changed dinamically via </p>
  
  <blockquote>
    <p>seek.setThumbTintList(ColorStateList.valueOf(swatch.getRGB()));</p>
  </blockquote>
  
  <p>But instead of a solid color for the thumb like this:
  <a href="https://imgur.com/a/xKs1B" rel="nofollow noreferrer">https://imgur.com/a/xKs1B</a></p>
  
  <p>I get a thumb with a sort of blurry (or non solid) color as this:
  <a href="https://imgur.com/a/7IYK6" rel="nofollow noreferrer">https://imgur.com/a/7IYK6</a></p>