Monrovia describes Hick's as "glossy dark green." So one thought is wrong label.

Please post images so we can see what's going on.

If you need help with that, look here:
http://forums.gardenweb.com/forums/load/hosta/msg0513322013993.html?14

Here is a link that might be useful: how to post images

Discolored yews are common here. It will always mean there is something wrong with the plant. Maybe yours just needs to be fertilized (with nitrogen) or maybe it has root rot. As a rule yews need excellent drainage, although I was just in an area (Diablo Lake) where there are Pacific yews growing just above a flood zone.

it has a magnesium deficiency. As always, you do need to get a pretty good idea what the specific problem is before you can expect your response to solve it.

You could try applying a granular fertilizer formulated and sold for use on evergreen trees and shrubs to see if there is any greening. Do it now, before the soil is chilled by winter cold and nitrogen becomes less available.

When your shrubs turn yellow it means it needs fertilizer, but if the needles are falling off or getting tan, your shrub is a gone. Good luck.

Here is a link that might be useful: Hicks Yew