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For more information about toxicity in watercolors, go to this post: Toxicity in watercolors
Daniel Smith Watercolors have a massive range of colors (252) including very vivid pigments, primateks and iridescent colors. Great dispersion and a lot of granulating colors, which can be fun. They list all of their colors in their SDS sheet, and I also like them for not using cadmiums at all. Quite expensive.