The relationship between color and the levels of fine, medium, heavy, king, and point grade clay bars typically varies depending on the manufacturer and their specific grading system. However, here’s a general guideline based on common industry practices:

Fine Grade (Light Contamination):

Color: Usually yellow or light-colored.
Purpose: Designed for light contamination removal and regular maintenance detailing.
Medium Grade (Moderate Contamination):

Color: Often blue or green.
Purpose: Intended for moderate contamination removal, such as tree sap, road grime, or light oxidation.
Heavy Grade (Heavy Contamination):

Color: Often red or darker shades.
Purpose: Used for heavy contamination removal, including tar, stubborn industrial fallout, or severe oxidation.
King Grade (Very Heavy Contamination):

Color: Sometimes indicated by darker colors or black.
Purpose: Specifically formulated for extremely heavy contamination removal, such as deeply embedded dirt, paint overspray, or neglected surfaces.
Point Grade (Precision Detailing):

Color: Can vary, often identified separately from traditional color coding.
Purpose: These clay bars are typically used for precision detailing tasks, targeting specific spots or smaller areas where contaminants need precise removal without affecting surrounding surfaces.
It's important to note that while color can often correlate with the grade or aggressiveness of the clay bar, specific manufacturer labeling and grading systems may vary. Always refer to the product labeling and instructions provided by the manufacturer for precise guidance on selecting the right clay bar for your detailing needs.