
@Bioshock: I didn't know you could do that! XD Well at least I know now if they wanted speedpaint they can do it! hahah
@KDA Drew: These are the type of sets we create:
Crate Sets and Rare set (consist of 5-6 poses)
-monthly thank you items that change every month, rare changes ever 2 months
-an artist can sign up for one or all, there are no limitations to the themes they do, contains 3 recolors
Premium Plasma Orbs
-RIG items that change every 3 months and contain multiple sets.
-The themes are decided by staff and voted on, artist is required to create items on theme
All in all we do not restrict artists when they sign up for sets that don't have themes. Generally speaking though you'd want a variety of themes if you are doing all 3 as you are catering to a large crowd of users. Things to consider are the gender inclination of the items, if poses are too restraining and if you have poses that keep repeating. (For example all 3 sets have a dress would cater to one crowd and is too repetitive in a bundle of 3 sets) Also have to keep in mind the items that already exist on the site because you don't want to create something too similar to what already exists.
In terms of your question with color, there is nothing stopping you from sticking to a color scheme with the sets that you create as there are 3 recolors in total. So you would have 2 other options to give users something different with each set you make.