Do you have to make certain parts "ugly" so they fit whole design better?

I have a "serious" and "established" design. Adding some colors make it look more vivid and let the user distinguish elements more easily. But they ruin the whole "serious" and "established" design. They are.. well let's say too exciting and require too much attention, especially for elements (e.g. a menu) that are needed constantly in the long term. This is a dilemma because less saturated colors and vivid colors have their pro and contra. I came to the conclusion that you need to "uglify" certain parts to fit the targeted design.

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What is your opinion?

Great design resource

100 Things Every Designer Needs to Know About People (Voices That Matter) Submitted February 26, 2019 at 02:17PM by hrnsn123 https://ift.tt/2TnMM44