What colors coordinate? Which colors look good together?
Above, is a drawing I colored. As you can see, there are a lot of colors incorporated in the coloring. There are reds, greens, oranges, blues, and browns. Those all relate well to each other.
If you have a small piece of paper, cardboard square, or index card, swatch out the colors to see if they work well together.
Examples of colors together:
Sunflower- Oranges and yellows, blacks and browns for the center part. A little red for more of a pop if you want.
You will have to find what colors coordinate, and what looks good in your mind.
With this next drawing, I wanted it to look like the season autumn. The colors reminded me a lot of the leaves in fall.
I hope this helped, but I think coordinating colors is more of what you think and not what I think. Art is always your opinions and thoughts, not someone elses. Do what makes you feel happy, and do what you love to do.