What color paint on a curb indicates no stopping, standing, parking, loading, or unloading?

The indication of no stopping, standing, parking, loading, or unloading is represented by a red color on curbs. This is a universal marking that alerts drivers that parking or stopping in this area is strictly prohibited. The red color serves as a strong visual warning, helping to maintain traffic flow and safety by preventing vehicles from obstructing the roadway or creating hazards in busy areas.

Other curb colors have different meanings: blue generally indicates accessible parking for individuals with disabilities, yellow is usually designated for loading zones or passenger loading for a limited amount of time, and white is typically for short-term passenger loading and unloading.