When considering colors, one thing to keep in mind is their saturation and brightness. The more saturated and vibrant a color is, the more energy it can give you. If it is less vibrant, more muted or grayish, the more calming it will be. Similarly with brightness, the lighter and brighter the tone the more peaceful it can be, the darker and richer the color the more energy it can give.
Colors also fall on a scale of warmth and coolness. Warmer colors such as reds and oranges make a room feel warmer, sometimes more cozy. Cool colors such as blues and greens make a room feel more cool and clean. Lighting can also change to warmth and coolness of a neutral color, so it is important to look at swatches in the correct lighting, sometimes different hours of the day.
From psychologytoday.com, Light colors make rooms feel more airy and open, even can make walls seem taller. Darker colors will make walls seem closer and rooms seem smaller.
Check out C2’s 2018 color palette for ideas and inspiration, click the image below:
One more resource for you would be Benjamin Moore’s color of the year chosen by their color and design team, along with their chosen palette of trending colors: