Hi Shannon,

The answer to your question is a bit different then you may expect.  An attractive color is really a combination of colors.  My first true relalation of this was when I was admiring the color of the purple Luna Wine bottle. I found it to be so beautiful that I wanted to use the color in my paintings. After some trial and error, the answer was that there was no singular purple color in it that made it beautiful. It reflected various purples, pinks and blues. You can achieve this by treating your digital work as if it was oil, and blending the colors together after you have put them down on the "canvas".  This also tends to move towards that pastel color you are looking for so long as you have your hights in there.  Adding white to a color makes it pastel, and having color variations that complement each each, makes it ready as an attractive color. Find a sample (art or photo) with a color you really like. Use the color sampler in PS and see how the surrounding colors have vaules outside of that exact hue. This means that they will exist on different plains, not just one color that gets darker and lighter. tru creating a 3 dimentional spehere. Make it grean and let it get darker as it moves towars the outer edge. Now, make the outer most part of it a deep blue that disipates into the green as it moves toward the center. This can come across as a singular beautiful color.  Good luck Shannon!