structboost.palette_audit

structboost.palette_audit(palette)

Measured separation and contrast for a palette, so a choice can be checked.

Reports the minimum pairwise OKLab distance under normal vision and under simulated deuteranopia / protanopia / tritanopia (Machado et al. 2009), plus the worst WCAG contrast against white. Targets are 15 dE, 8 dE and 3.0; a palette failing them is not unusable, but colour is then a supporting encoding rather than the identity channel.

Parameters:

palette – A key of the built-in palettes ("tab5", "tab10", "scanpy20", "safe") or a sequence of hex colours.

Returns:

dict – n, min_de_normal, min_de_cvd, min_contrast and n_below_contrast_floor.

Return type:

dict