I've posted links to two quilts in the same pattern.
Mine is done totally scrappy. I paid zero attention to color, only to value (light vs dark). I used batiks, solids, blenders, prints, novelties ... EVERYTHING. I didn't look at the "color" or the "print" when I sorted them, or grabbed one to sew ... I only looked at "value". I do confess to fussy cutting some of the scraps to prevent horses heads from being cut off (as an example).
The original pattern by Bonnie Hunter was done is scrappy blues and cream/white.
If you want to go totally random scrappy like mine, sort your scraps into three piles - light, medium and dark. I used some of the mediums as darks by pairing it with a very light fabric, and I used some of them as lights by pairing it with very dark fabrics. Ideally, your medium pile should be no more than 1/2 the size of your light or dark pile to get the most of the dark/light values in the pattern.
For a single or two (or more) color scrappy like Bonnies ... sort the scraps into a blue and a white pile. You can probably also use some very light blues in the white pile.
http://www.quiltingboard.com/picture...h-t260968.html
http://quiltville.com/blueridgebeautyclasslist.html