What's with HGH and color tops?

[couldbeenapimp]

im sorry if this is a forbidden question... Google and Reddit and such tell me that HGH colored tops have a history where they used to mean something, but no longer do. But I still see sources breaking out offerings by colored tops. At this point, what do the colors mean? I presume there is no standardization among sources.

 

[tension]

the color does NOT matter