Roofers put the wrong color shingles on my giant shed...

So I have a giant shed at the end of my .5 acre lot. It had a brown roof which matches all the trees around it and creates good asthetics imo. Right now I am renting out the bedrooms and plan on selling in 5-10 years.   I really think a brown roof would look much better in terms of asthetics. They ended up putting black shingles on instead.  Should I have them reroof the entire thing to the regular color or if they offer me a good discount should I take it. Thoughts?