Comment 1 for bug 171589

I vaguely recall other programs like Adobe Illustrator have
various colour tools, I suspect they work a little
differently than colour tools in programs like GIMP or other
photo manipulation software. If you could specify how other
vector programs present this functionality it might prove
helpful to developers and designers when they come to
implement it in Inkscape. I'm fairly confident this would
be a lot of interest in features like these but as you have
described yourself inkscape users are quite good at working
around the problem, so I think only when these features are
implemented will people realise quite what they have been
missing.

> Inkscape needs color tools (Hugh-Saturation,
Brightness-Contrast, Curves, Levels, etc.)

it might also help if you could be more specific and maybe
help developer decide what they should work on first.
(sorry for being so vague, essentially i think this is a
good idea and I encourage you to provide more information to
make it as easy as possible for developers to get started on
something)