title: Is Core Animation color blended layers useful or say is it necessary?
body: <p><strong>Color Blended Layers</strong>
  Open Instruments and choose the Core Animation template located under iOS / Graphics. First, click in the Core Animation instrument's timeline to reveal the bottom pane and find the section labeled "Debug Options". Check the "Color Blended Layers" box, which will show a red overlay over layers that were blended and a green overlay over layers drawn without blending.</p>
  
  <p><strong>Is Core Animation color blended layers useful or say is it necessary?</strong> 
  I found that the system UI is red blended yet. 
  And my app is also red blended in some areas.</p>
  
  <p>what should I do? </p>
  
  <p>Thanks in advance.</p>