True, colors can incite emotions, and this is something that would have created differences in a community that was devoted to sameness. In addition, color would have created differences. Look at how color divides society. In many segments of society, people of different colors are treated differently. Consider the jokes about blondes, brunettes, or redheads. Color, like it or not, plays into differences and that is something the elders could not chance.
I do not think that the Elders removed color from the community. After all, when Jonas starts to see colors, it's not as if color returns to the community. Instead, what's happening is that Jonas can see colors that were always there. So I think that the Elders didn't remove colors, but that the people lost the ability to see colors.
I think that this happened as everything became the same in the community. Colors are one way to distinguish between things, right? But the whole community is based on everything being the same. As people really came to buy into the Sameness, they lost the ability to see differences like different colors.
This is why people who are different, like Jonas and the Giver, can see colors. It's because they have not bought into the Sameness.
In the end, you will need to come to your own conclusion regarding the reasoning behind their decision. Some possible explanations:
Maybe they were concerned that some colors might excite emotions or feelings among observers that would upset the society they were creating in the community.
Maybe there was concern that certain colors might be perceived as creating differences between people in the community, which would be counterproductive to their purposes. In society as we know it, certain colors may identify gangs, royalty, or other groups that would have been unacceptable in the eyes of the Committee of the Elders.
They removed colors from their life ecause colors brings out emotions, if the community sees the beauty of colors and nature it will trigger their emotions. Some maybe wouldn't like it and some maybe would fall in love with nature so it would destroy Sameness as well.
"Communitie of Elders" remove colours because lots of colors triggers emotions,feelings.They can create a society which can have a freedom of choice too,they can choose their favourite color.