Hello Naetha. Sorry to hear about your grandmother. I hope she has a lovely service, and that leaves you with good thoughts about her life.
My friend's funeral was no black, "except for those for whom black is their entire wardrobe - you can come as normal!"
I wanted to get a dress that was appropriate, but that I would wear again. I felt that attitude was in the spirit in which my friend had requested a no-black service. And, you know, it works - I think of her when I wear the dress - in a good way.
I chose one in purple and blue, very much in the shape tethersend has linked to, oddly enough.
It was a lovely service, and people came in a vast range of clothes. Including one woman who came in a beautiful, dressed-up gold brocade coat.
It very much turned into a celebration of my friend's life, and a drawing-together of those of us who knew her, and were in that life. I hope your grandmother's service brings you those good memories, and that sense of her life as being a good and loving thing.
All the best.