We had blue uplighting for my blue & green wedding :)
We did amber uplighting
Warning: I was bad and didn't save these sources:
Bumping for more.
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We are having our dj company do our uplighting. They will be providing 12 lights and also intelligent dance floor lighting that will have these amazing slow moving lazer lights on the ceiling (it almost looks like the starlight dancefloor lighting that adamsapple posted, but on the ceiling)
I love all of these ideas.
These are supposed to be blue and purple ;)