When you want to buy the proper eyeshadow palette, you need to get in the right range of colors. You can go into a certain color family like greens, blues, pinks, or even rouges. You will notice that these colors have a lot of the primary colors that you need, and you should also try to make sure that you see complementary colors that you like.
You should also consider getting a palette that has a blush and a few lip colors.
Read more at: https://rudecosmetics.com/palettes