What should referees do if they observe multiple lines of different colors on the field?

The correct choice emphasizes that it is permissible for referees to begin the contest even when they observe multiple lines of different colors on the field, as long as those markings do not create confusion or give advantage concerning the rules of the game. Rule 1-2-1 provides guidance on the markings for a soccer field, allowing for certain adaptations or variations as long as the match can be conducted fairly and safely.

This provision is important because it recognizes that different fields might have pre-existing markings from other sports or previous use that could be present. As long as the lines do not interfere with the flow of play or create a significant issue for player safety or clarity regarding gameplay, the match can proceed without requiring a cancellation or additional inspection.

In contrast, canceling the match due to improper field markings fails to recognize the allowance for such variations. Additionally, redoing the field inspection may not be necessary if the markings don't impede the match, and consulting with the head coaches might not resolve the issue at that point when the rules already provide for starting the contest.