Relative color tweaking of multiple selected objects (Feature Request)
Right now in Inkscape, if you select the artwork with multiple colors and tweak it in the color picker menu all the colors will snap to one color.
So, the main inspiration for this feature is a color-changing behavior in Xara Graphic Designer.
Xara enables you to change selected hues of the selected objects preserving its original Lightness and Saturation values, taking it as a starting point.
Example :
Object A: HSV: 10, 20, 30 Object B: HSV: 0, 10, 20
Color tweaking operation:
HSV: +5. +5, +5
Outcome:
Object A: HSV: 15, 25, 35 Object B: HSV: 5, 15, 25
Video example A:
Pay attention to how Lightness and Saturation values are preserved across the selected objects. You can still tweak it, but the original values would be used as a base for any additional changes.
https://youtu.be/c0bEF8qdyT4?t=361
Video example B:
Notice the dropdown above the color picker menu to select the needed HUE among the hues of the selected objects.
https://youtu.be/atTyUbMCGLs?t=22