Every beautiful color palette begins with one color as its foundation. If you're having a tough time choosing a hue, look at the colors of your clothes for inspiration. If you look ravishing in red, you could love a room in the same shade.
Once you've identified your main color, include lighter and darker versions of it in your color scheme. A variety of shades looks vibrant and rich.
A basic formula for a harmonious color palette is 60% your dominant color, 30% your secondary color, and 10% your accent color. One thing to keep in mind is that analagous color schemes (colors next to each other on the color wheel, such as blue and purple) feel more relaxed and casual than contrasting hues.
Combine cool and warm colors for balance, and be sure to remember that wood tones often provide warmth.
Round out your color palette by adding neutrals such as white, cream, or gray. These colors give your eyes a place to rest and can tone down bold colors. The more neutrals you add, the softer your color scheme will become.
Finally, finish every room with a bit of black. Even the smallest touch will help ground your decor and make your colors pop.