I am using WGCNA to generate gene co-expression network. I am confused about the how to interpret gene module colors. My understanding is, different modules will have different color. So the downstream analysis could be based a specific colored module such as blue. However, the cluster dendrogram figure show that different modules( which are not close to each other and not merged together) could have the same color, for example, there are several modules with color blue. I have been trying to find the answer in manuals, but couldn't figure out.
Could someone give me some ideas. Appreciate your help!
cluster dendrogram figure: