Such important things, like buttons, should be visibly different from other elements. So, consider changing their size and colour to make your buttons stand out.

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Buttons stand out among all other content by their colour, size, etc

The Von Restorff effect, also known as The Isolation Effect, predicts that when multiple similar objects are present, the one that differs from the rest is most likely to be remembered.

Von Restorff Effect | Laws of UX