Could be much cuter with just some more interesting paint colors on the walls.

They passed with flying colors with their background and credit checks, as well as their past landlords and references.

What color is your flat roof?

Like an applicant asking if we would put in hardwood floors, or paint the walls a different color, or buy them room-darkening curtains because the street lights might keep them awake at night, etc. 

@Chris Davidson The Color of Law by Richard Rothstein

What is the paint color you used?

That means neutral colors, even though it may seem boring. 

I would also give the tenants two options on carpet style and maybe 3 colors.  

He passed every other part of your screening criteria with flying colors, why wouldn't you rent to him?

I would choose a color for the cabinets in this case.