GTL tries to use a standard paint color when re-painting interior walls. This article talks about that standard color so you can match it.
GTL takes over management of many homes with different color walls, so it's always possible that the color in the house that you're renting is any number of different colors. But once we re-paint the interior of a house in between tenants when paint is needed, we use a standard color from Sherwin Williams called "Agreeable Gray." If you aren't sure if your house uses this color, you can get a free sample swatch from Sherwin Williams to hold up to your walls to see if it matches.