How to make the background less blank?

[ClockworkOcean]

@YourMomIsAHoe99

So, i am working on this project on the rolling ball template and i noticed that my backround looks a bit dull. Is there any way to fix this? heres a picture.
https://cdn.discordapp.com/attachments/811283104042975242/817895123144015882/unknown.png

Where’s the picture?