Yes. We print in full colour at 900DPI (that's photo quality) using the latest digital printing technology. We can also print brilliant white.
There are no extra costs for the number of colours you want to use.
Here's a colour swatch printed on holographic material. You can get your own here. The swatch shows different CMYK colours printed over the holographic material to give them a metallic effect. We can print white behind the colour to remove the metallic effect.