Is the temperature the same in shadow under a dark colored fabric awning as under a a light colored awning?
As long as you are some distance from the awning and/or their is plenty of ventilation then it wouldn’t matter at all. However, a dark awning is going to heat up more (it absorbs light and converts it to heat where the light one reflects most of the light) and then re-radiate some of that heat. Thus, if you are close to the darker awning, or their isn’t good ventilation under it, then it will definitely feel warmer under the darker awning.