You need to find out based on your hair, skin tone, eye color and such if you are a winter, spring, summer or fall color… from there its easy. Here is a website that might help you site

When I had taken Fashion Design in High School we had to learn this concept, it helps when trying to design something for yourself and others if you apply the concept. Like I am what is considered to be Fall for my coloring so I look better in greens and browns… its all explained to you on the site and also gives the pallettes of color for each of the different seasons

You must get compliments when you wear certain colors. Personally, I think the intensity of a color is most important. I almost never wear pastels, and there are a few colors I steer away from no matter how deep the color is. Green, yellow, pink don’t do anything for me. My best colors are brown, blue, off white, red, and black. I have pale skin, with a reddish undertone, blue eyes, and medium brown hair.

What is your coloring? Brown hair, pale skin? Dark skin, black hair? Red hair? Blond?

I agree with @JLeslie, pay attention to the compliments you receive!

My mom “had her colors done” in the seventies. She met with a specialist who told her exactly what worked for her.

I have this book called “Color Me Beautiful” by Carole Jackson. It is helpful for figuring out the whole color-seasons thing.

@answerjill believe it or not I get the most compliments of what I am wearing when I wear the colors that fall within my season which happen to be fall.

One tip to offer to the above suggestions: Try wearing the same color as your eyes to bring out the eyes.