Here is a vector of colorful abstract background from eps10.net. This image is a vector illustration and can be scaled to any size without loss of resolution. This image will download as a .eps file. You will need a vector editor to use this file (such as Adobe Illustrator).
Name: Free Colorful Abstract Background Vector
Homepage: EPS10
License: Creative Commons Attribution 3.0
File Type: EPS
This image is a scalable vector graphic and can be scaled to any size without loss of resolution. This image will download as a .eps or ai file. You will need a vector editor to use this file (such as Adobe Illustrator or CorelDRAW).