I'm sure there are plenty of people here that will give you more complete information, but I remember one thing about acrylics that drove me mad. I painted with them for several years before I discovered oils 17 years ago. I don't remember being shocked about differences in the actual colors and how they mixed together when wet, but I was amazed at how much acrylics darkened when they dried. I didn't realize how much I'd struggled with that until I switched to oils and the problem went away. I thought the hardest thing was getting accurate values.
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