Alright so, I don't have rainbow orb myself but lets pretend I do in the screenshot bellow.
Here's an idea.
Some users have more than 1 signature/avatar, and they have matching orbs for those. Those matching orbs are being saved in Codes either in profile, notepad, etc.
Instead saving those orbs in Code version, how about adding an option to actually SAVE the orb you like?
It would work on a following principle:
1. Find a color combination you like and Preview it (as right now)
2. Fill the RENAME box with the new name for the orb to something that will make your life easier. It can be either names of colors that are on orb, or sig/ava it matches to (e.g. rename your yellow/black orb to PIKACHU)
3. Press SAVE and your orb with it's new name will appear on the right side.
4. whenever you wanna use different orb, instead looking up codes or trying to find your lost combination of color codes, just smash that button and Update it.