A list of my favorite websites you can use for inspiration.
Be aware of Copyright laws if you consider to use some of the images as your reference.

https://www.pinterest.com

http://www.britishmuseum.org

www.moma.org

https://artsandculture.google.com/

Sometimes we get stuck with what colors to choose for our artwork. Here are a couple of websites to help:

https://www.design-seeds.com/

http://patterncurator.org/