Had pool renovated right before winter, deck was put in and about two weeks later pool was closed up (winter cover, bags) Pulling back cover it appears concrete is a bit darker under the cover is this due to no sunlight like the rest of the deck has had for months and will it "cure" more and lighten like rest of deck or am i just screwed with a two tone concrete deck? It appears near the house where this a lot of shade deck is darker than the side that gets all sunlight so hoping this is a sign that cover issue will correct itself when cover is off and gets sun