To avoid excessive grass treading you should carefully plan a communication system for your garden. You do not have to use paths with every corner of a garden but only to those parts which you will use the most often.
Paths not only have a practical function but also they are an important visual component. Using paths you can define an importance of a particular place: a path to a terrace should be much wider than a path to a vegetable garden.
A way of composing paths must be related to a garden’s style. In an informal garden, paths referring to natural landscape will suit, while in a formal garden a regular communication will be the best option.
With regard to colours, paths should correspond with a building and fencing. If your house is made mostly of natural materials, a good solution will be using a surface of dressed stone. And when your house is decorated with clinker brick, you should use similar bricks in your garden.
When you select colours, try to avoid gaud colours. Remember that a garden is, most of all, a kingdom of plants.