Fix reversed color scale issues in annotated heatmap figure factory #1251
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Currently, `reversescale` does not get included into the `trace` dictionary. Therefore, color scale doesn't change when setting it to `True` (although the color of annotations gets inverted).
- pull out black/white colors as variables - Add should_use_black_text function to hold color contrast equation
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michaelbabyn
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Dec 22, 2018
…lotly#1251) * Fix reversed color scale in annotated heatmap. Currently, `reversescale` does not get included in the `trace` dictionary. Therefore, the color scale doesn't change when setting it to `True` (although the color of annotations gets inverted). * Small refactor to pull out black/white colors as variables and add should_use_black_text function to hold color contrast equation * Handle reversescale when passing in a custom colorscale
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Builds on #867. Thanks for getting this started @inguar!
In addition to the commit from #867: