When I print my webpage I lose all the css colouring. Is there an option or script to print a webpage exactly how it looks?

My webpage has a table mainly. The tables columns have different background.

When I print I lose the background colours even though I am printing in colour.

The colours are not gray, they just don't come up

You can usually specify that the background gets printed in your browser options, at least in Firefox you can anyway.

This is possibly a CSS issue. Check your stylesheet MEDIA type http://www.w3.org/TR/CSS2/media.html