To the original poster, the color specific questions of that quest are not ones that require to you visually look at an item to determine its color, if that was the case I could attempt a work around for that situation.
The actuality of the quest, requires basic knowledge of standard color "features" so to speak and other things taken from contextual references, I won't go into detail here to avoid our spoiler policy, but you are more than welcome to e-mail (address located in my profile) me or find me on IRC and I'll be happy to discuss this with you in more detail.