re-ColorMesh gives you the chance to customize the presentation of the result (which is a mesh) before you bake it. It is most useful in cases that you are dealing with multiple studies and you want to have a consistent presentation (eg. normalize the legends). It is also useful to customize the presentation for or a study that takes so long to re-run.
You can apply the similar changes using legendPar input in the component itself but then you have to re-run the study.
I attached an example file that shows how you can normalize the legends, change the colors and add custom comments.
Hope it helps,
Ladybug_recolor_Mesh_Example.gh (35.9 KB)