If I recall, developer should only be stored in bottles marked as PETE 1, because they don't allow oxygen to get in easily. As you probably already know, oxygen is what ages your developer. Other chemicals can be stored in most any bottles. FWIW, my bottle of vinegar is stamped on the bottom HPD 2, which is not what you want for developer. It is also a clear color.
If you search the threads, you will find many posts about plastic use in the darkroom. The color is probably a non issue. I like the brown for both the traditional look as well as alerting me that it is a chemical. If you use water or soda bottles, just be sure to have them labeled so you don't have an accident. Some like beer bottles, just remove the label.