If you used the bottle array and changed the bottle colors from the "rainbow coalition" to be the "colors of the SRM chart" i.e. from straw pale to extra stout and 4 colors in between, you could have something there.
Can a corporation file a lawsuit over a logo that a home brewer uses for a not for profit hobby?
Depends on if the logo is a "Trademark" or "Copyright"ed. Legally I believe they can, the question is "would they". I don't think it's worth their time to do more than to send threatening letters. I doubt they would actually file a lawsuit, that would cost them too much in filing fees.