easily select the right or most sensible color scheme for your plot

Usually we will face the problem of selecting the right or most sensible colors for your plot, where there would be several continuous levels or some distinct groups. How to make you life easy with that problem?

Some time ago, I will depend on r color chart . I will do the selection by my eyes and my mind. But, it is hard in fact, because there are so many different colors in front of you, and it is difficult to evaluate the different color combinations by your mind.

Now, I find a tool. It is can give you help by contrasting the colors for you. Colorbrewer, go there and see, please.

(1) Colorbrewer, the webpage

(2) R color chart, a part