you could hover over the color swatch (don’t click it) and press ‘e’ key, that enables the picker (works for other fields that support pickers as well)
texture paint mode has a shortcut ‘s’, which allows you to sample color directly from 3D view
For a while there I had a key combo that, if the Eyedropper were active, holding down the key and clicking would add the sampled color to the color palette, if one existed.
S+Clicking. --This is the first I’ve heard of “s”. --What I don’t understand is: why is there a separate “e” and “s” function? It seems like “s” by itself could do the job.
IMO it’s redundant and confusing. While “e” for eyedropper is mnemonic, “s” is generally more powerful. (“s”=“sampling”) An eyedropper icon added to the Palette section would make sense too.
‘e’ is just a shortcut for eyedropper on any relevant field (it actually existed even before an actual eyedropper icon in such fields appeared). S samples for a predefined field, and is specific to texture paint mode.