Change colours of buttons

I need these six images to be altered for my project. They must be the same dimensions and resolution as they currently are, but I just need the colour changed of each of them. I would like all the buttons to have a metallic finish to them. There are two iterations for the three different buttons, representing not pushed and pushed states. For the first button "Respectable" I would like it to be a green colour. For the second button "Brow Raising" I would like a yellowish colour. For the third button I "Absolutely filthy" I would like a red colour. As mentioned, all colours should be metallic in style. The idea is to have the three of them showing an increase in intensity similar to this: [login to view URL] I have attached a file with how the buttons currently look