We can't use black, say whaaaat??

Ho jeez. Well. Here's my drawing for the all-black-still-life-without-using-black assignment. Gahhhh I'll admit that I got super super frustrated with this and it took me absolutely FOREVER! Hours upon hours of messing around trying to mix and layer colors and I'm STILL not happy with the result. I mean, I like it for what it is, but I'm just afraid that it's not dark enough or clear enough or fully explores the dark tones that could have been made. Ugh. At this point though, I've already reworked it and darkened it a bit so I guess we'll have to see what happens. And now I'm off to bed before I collapse from exhaustion. Ahh the life of an art student! @_@