When selecting your colors, it’s best to use a variety of contrast level (and ideally temperatures and saturation levels). This gives you more options for legibility as well as cooperation with events and partnering businesses.
If all or most of your colors have the same level of contrast they can easily become muddy and illegible in combination with each other. This increases the need for ‘boxes’ or backgrounds of dark or light neutrals and makes your layouts appear cluttered. There are resources online that can test your color contrast to ensure the legibility of your accent colors if you’re unsure.