When creating a palette, pick three main colors to use throughout the space. Then, follow the 60-30-10 rule. Interior designers swear by this rule, which calls for 60% of the room to be one color (your base color), 30% to be your complementary color, and for 10% to be an accent color.
Common color schemes often include a base color (such as purple, teal, or green, for example), a secondary neutral color (like gray, beige, or white), and a pop color that should be complementary yet still bold enough to stand out. Some people like to pick eccentric accent colors, like orange or bright red, to liven up the space and make it feel more personal. If you're going for a more modern or contemporary room, having a bright accent color is necessary.
Additionally, make sure that your accessory items, such as picture frames and plant containers, stick with the theme and the color palette. Otherwise, they can look out of place.