What does a red curb typically indicate?

Curb painting is generally standardized across most US states: red means no parking or stopping at any time (often near fire hydrants, intersections, or emergency access points); yellow means commercial loading and unloading only, often with time restrictions; white means passenger loading and unloading only, usually for short periods; green means short-term parking, usually with a posted time limit (often 10-30 minutes); blue means accessible/disabled parking only with proper credentials. Always check posted signs for specific times and restrictions, as the curb color alone may not tell the whole story. Parking at unmarked curbs follows the default rules of the area.