The files I generated today & starting to think about using colour, is it necessary for the content?

To be honest I think the colour detracts from the overall composition and starts to make the overall image look a bit too jazzy. I think colour will be great for promo stuff, but for the inside I am liking Greyscale I think, Fits nicely with my victorian botany book as well.

I also just wanted to mention that the actual body copy's content is temporary, and is from Wikipedia. I just did it to see what the pages would look like with relevant type on them.