But when I do, I look for impressively geek articles like this one. What can be more important than understanding the colors of the lightsaber crystal?
http://www.vox.com/2015/5/31/8689811/lightsaber-colors-star-wars
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The Worlds of Tarien Cole 
It just goes to show, every little detail in a story is chosen for a reason.
Hopefully. Though as the article notes, there are inconsistencies in the lore.
That’s true, and my favorite example was that Samuel L. Jackson requested a purple light saber. As for color choices in the expanded universe, I suppose it was up to the individual author what they meant at the time. I think Darth Vader’s black armor and red light saber may have evoked Nazi connotations to the first viewers of the original film.