Arguments for colour choices of parking tiles are often guided by convenience and styling. Grey is still among the most popular colour choices, simply due to how practical it is in terms of disguising dirt and marks, etc.
Brown and terracotta colours lend a more darker earthy look.
Black parking tiles are also a stronger option and suit a more modern space as well. Because
beige and
cream are also popular colours, and end up being messier, thus requiring more maintenance. Many still love to have patterned and or two-tone tiles to help provide some visual pleasantries in the area. Darker colours typically outperform lighter colours for heavier vehicles, while lighter colours in turn can make a space appear bigger. Ultimately, it is up to your own style and preference, required level of maintenance, and yes your house and its design.