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It looks quite good and balanced! I also like the idea :) What doesn't fit here, in my opinion, is the violet colour, that you use as the background or title colour sometimes. Maybe it's just personal, but I don't like it. I would try to find something that would refer to the colours of the heatmaps. Or maybe use black instead? You don't use much black anyway, so it could add nice contrast. Good luck!

I believe that's part of the brand they've created over time now :)