You can color-code your trip view with Speed Bands. It allows you to view a range of how fast a vehicle was traveling during that portion of the trip.

Each band is fully customizable with the ability to set the speed range and the corresponding color in the app. 

Select Notification Settings from the Options Menu [•••], then choose Speed > Speed Bands.

Move the slider to select your speed range (for example, 40-50 MPH). Pick a color from the list of default colors, or use the custom color picker to create your own color.