This is already possible. You can by cat ears for your headphones already in different colors.
https://www.amazon.de/Razer-Kopfh%C3%B6rer-geeignet-Kraken-neon-purple/dp/B079YFV2MJ/ref=asc_df_B079YFV2MJ/?tag=googshopde-21&linkCode=df0&hvadid=309939621091&hvpos=&hvnetw=g&hvrand=2160451302902272725&hvpone=&hvptwo=&a...