Apply after that this tool 
to represent them symbol of the play button. Color it in 404B51.
Blending Options-Inner Shadow
Applying the same tool, draw one more button's symbol, using the previous color.
Blending Options-Inner Shadow
Make a copy of this new made layer and make use again of Free Transform option to turn the picture around on 180 degrees and then place it like you may see below in the picture.
Take the next instrument 
and represent the symbols of the buttons colored with the same color used before.
Blending Options-Inner Shadow
Click to enlarge
The final result is this one!
