If you look hard enough, you will see loads of color combinations in our very nature. COPY those colors into your art work. Perhaps you don't even have to paint or color a flower, just load your paint brush with a chosen color, apply it to your canvas or paper or cardboard, pick up a new color after you have rinsed your paint brush, and lay that down on the canvas in another spot or next to the first color. Keep on doing this with just two colors or three colors and fill up the canvas. You will see how colors change when they are placed next to a different color. Sometimes grey can appear blue. Check it out!