https://bugs.kde.org/show_bug.cgi?id=397889

Emmet O'Neill <emmetoneill....@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |LATER
             Status|ASSIGNED                    |NEEDSINFO

--- Comment #2 from Emmet O'Neill <emmetoneill....@gmail.com> ---
Hello Tom,

You're absolutely right. I think this a result of the way that the color
picker's blending feature is designed; since it's interpolating based on a
percentage, without any rounding at all, your current color can only approach
some point that is infinitely close to the canvas color that you're picking
from. 

What actually happens is that the color seems to round either up or down to the
nearest color based on your blend percentage. If your blend setting is >50% it
should "round up" to match the same color as your canvas, but if your blend
setting is <50% it "rounds down" to a color that is just adjacent to the
sampled color. 

On top of that, because tablets are a bit sensitive, it's usually more
comfortable to use a <50% blend setting while painting, which means artists
tend to run into this limitation of the current design quite a bit. Of course,
a little bit of color variation can certainly bring some life into a painting,
but this does mean that you have to fiddle a bit with the slider values in
order to match colors exactly, which is a bit annoying when that's what you
want to do.

Having a shortcut which allows for temporarily bypassing things like blending
and radius settings is a good idea (in fact the color picker side of the code
already has a "pure" parameter which would allow for that).

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