In a survey at the end of the class, here are some of the points that you mentioned as important lessons for the day.
Color is more than just beautiful.
There are many questions one must ask when encountering a substance to understand the substance fully. It was interesting to see the transition from dye for fashion to great medical advances. I learned that the development of the dye industry began and was perfected in Germany and how color eventually became an important tool in chemistry. It's amazing that something like that could be used for so many things. Color is used for more than aesthetics.