The colors stated can be in any tone or hue, such as light green or dark brown, etc.
A mascot may or may not be added into the design. It will be great if the mascot was a caricature of a grain, for example, a rice grain, with the name Grainivore around or on the mascot.
The ideal design would be to have a signature logo incorporated into the word "Grainivore". Something along the lines of subway, virgin and youtube logos where the design has been incorporated into the logo.
We are not looking for a logo that sits beside the word "Grainivore", such as the toyota and united airlines logos.
We are also trying to move away from the fast-food look. So a slightly complicated design will be good.
No copyright infringement intended.
UPDATE: We want to be seen as slightly upmarket.