Working with settingConfig and listentries

As a newbie I was trying to search but did not find the answer. My question is  Is there a way how to ID particular settingConfig or listentries block and point to it from other settings ?

What i mean: I have dozen of objects in app and i am giving user option to choose various values for each (eg. font, color etc.). At this moment my settings file line count is huge as every new object multiplies required lines. Choosing color as an example. Do i need to copypaste all color pallete list entries for each settings object  or can i point somewhere and have colors configured just once ?