Final answer:
The color of the parking control knob on the dash of a vehicle can vary, but it is generally red.
Step-by-step explanation:
The color of the parking control knob on the dash of a vehicle can vary depending on the make and model of the car. Generally, the parking control knob is red, which indicates that the parking brake is engaged. However, it's important to note that not all vehicles have a parking control knob on the dash, and some vehicles may have a different color for this knob.