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I know Materialui.co, really good resource. My point was more in the direction of good combinations of colors. However, thinking about it I came to realize that the best approach is to let the user decide. I will extend the Material theme to generate the right CSS for the 400- or 500-variant of every primary color in Google's Material Design palette and good matching accent colors, so the user can decide from the configuration file.
However, thanks for your feedback!