Typogenerator is a site that will generate backgrounds for your text. Just type whatever word you want to have a background and TypoGenerator will show you randoms of background including the text design and color of the word you have typed.
If you'd like the generated background, you can keep it and just change the text design and color or vice versa (keep text design change background) if it doesn't fit your taste. If you want to keep a copy of the generated typobackground in you computer, you can manually download it by right-clicking the image when it's in the 640x480 size view.
TypoGenerator uses images indexed from Google, meaning it's involve copyright issues that's why TypoGenerator stated that "you may use images generated by typoGenerator on private websites, but NOT for any commercial applications. the images used for generating may be subject to copyright."
But for personal use you can use TypoGenerator to create typo background and use it freely.