[droopy]

How can I search for just those books (epubs) that have images, but not just any type of image, but full-color images?

Here's why I ask. For those books with full-color pictures/illustrations/artwork, I'll tag them as such and make sure to forego reading them on my Kobo Reader. I'll read these books on my laptop or a tablet.

On my Kobo Forma reader, I want just those books with black-and-white or grayscale images.

I don't mind if the only thing with color is the book's cover -- they can enter my Kobo Forma.

I also don't mind if an additional thing with color is the publisher's logo. For example, the orange oval that surrounds the PenguinRandomHouse's penguin or HarperCollins red-over-blue torch logo. These things can come into my ereader too.