Well, my brother, besides, of course, negative reinforcement (backpedaling on some certain policies, as long as it doesn't wreck the overall anti-imperialist, if not socialist system), or crackdown (destroying western-funded media)
Assuming you are a country of that type, you may have to create economic policy of material incentives to undermine the source and causes that indirectly can be redirected by foreign powers to color revolution
For example, in the "China has billionaires" essay, regarding the Hong Kong protests:
Hong Kong’s opposition has been tamed. Now, Beijing is turning to the city’s wealth gap and lack of affordable housing, which it blames for the social unrest. Up for consideration: Reforming the tax structure and increasing land supply. [17]