I can't change color of the u23F8 (pause symbol). play symbol looks ok and I can change its color
playPauseButton = new Button(mContext);
playPauseButton.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 72);
playPauseButton.setTextColor(Color.WHITE);
...
if (mPlayer.isPlaying()) {
playPauseButton.setText("\u23F8");
} else {
playPauseButton.setText("\u25B6")
}