Freebbble!

From the author:

“I decided to give you guys a sample of my huge blurry background collection I made a couple of weeks ago. These are some of my favorites in my collection.

If you guys like what you see, and decide you want more, I have my 400 Blurry Background Bundle available for purchase on Creative Market for only $5! If that’s something you’re interested in, feel free to check it out here:http://crtv.mk/dYYy

Sizes: 2560×1920, 800×600, and 400×300

I hope you enjoy them!”

16 Free Blurry Backgrounds is a free Background design resource made by Dribbble user Brandi Lea. As far as I can tell, its license is Free for Commercial and Personal Purposes.

Helpful hint: Dribbble users are nice. If the license is unknown, it is usually because they forgot to mention it explicitly; not because they were being stingy. Ask nicely and they will probably allow you to use it.