First run,second run,green purple,what does it all mean?

[Steel Town Tough]

Question?I see words like 1st run,2nd run,blue,red,ect when talking about bases.Is there a difference?How do you get 1st run,2nd,ect.If one year they are frosty colored and the next blue.Is color the only difference.How does a new coach buy the right stuff?Thanks in advance--STT you tweakin exports are awesome in doing what you do--hats off to ya!