can you tint white car paint?

I bought some paint at Home depot and the tint base was almost a clear, very light honey color. he had to add any color I needed by the machine , ie. white or red or whatever. I got a paint chip sample and took it to a body shop customer and he made me a 2oz touch up bottle. He said my 'sunburst silver' had a little green in it! It didnt really match unless its is supposed to have a clear on it. IIRC my paint job was a single stage.