I would love to have 3-7 color palette presets that are always available in the paint menu so I don't have to zoom across the map to eyedropper the color palette.
Example of what I currently do: All housing is the same color; if I go to a separate area of the map to place new houses, I move the camera over a far distance to other housing locations to grab the palette. Alternatively, I place the housing somewhere that has the color palette and then move it across the map to where I want it.
Related: It'd be cool if there was an option to "link" or "lock" one of the color presets on a prop/doodad/fitout/housing and when you change the preset, it changes all of the props/doodads/fitouts/housing that use that color palette.