The first ones I got were from vista print and they were full color.  

Everything passed with flying colors.

You might think about doing a different color border instead.

A door with a window would also be more inviting, or paint the existing door a fun color.

Should we paint them a lighter color?  

The house is cute just no pizazz with that color scheme.

From what I can see in the pictures, it needs some landscaping work to create some curbside appeal (some bushes and dead grass areas fixed), the basement needs to be finished (completely dry-walled, needs paint/flooring/trim), upstairs needs paint/carpet (mostly good condition, just old/dirty/strange colors).

We will not be coming to you for paint colors and conflict resolution. 

I hated getting the complaints from SFH renters that they hate the paint color or the light fixture looks old, etc.

Here's another tip: take a photo and print out in color to show dramatic proof.