Colorbrewer2.org has a colourblind safe version. https://peterkovesi.com/papers/ColourMapsForColourBlindIAMG2... talk about designing colormaps in the colorspace of a particular colorblindness (instead of checking whether it is safe after the fact which is non-optimal). My very basic understanding of that is that it'd replace sRGB with a colorspace that represents a particular colorblindess and then uses the same algorithm it'd use on sRGB to obtain a nice scheme in the colourblind space (or at least as much as it is possible given the constraints/reduced gamut).
I am not colourblind though, so I can't vouch for how good these are in practice, but at least there is some systematic thought that went into the process instead of ad-hoc rules.
I am not colourblind though, so I can't vouch for how good these are in practice, but at least there is some systematic thought that went into the process instead of ad-hoc rules.