https://romannurik.github.io/AndroidAssetStudio/icons-launcher.html
http://www.w3schools.com/colors/colors_picker.asp
http://www.javascripter.net/faq/hextorgb.htm
http://html-color-codes.info/colors-from-image/
http://stackoverflow.com/questions/15852122/hex-transparency-in-colors/17239853#17239853