Ideas needed for covering join?

[Mr blue]

 

[VanDamMan]

@Mr blue .....have you thought about a contrasting blue cab carpet I’ve used fat bobs emporium
Fat bobs emporium

 

[The Bear78]

Are you worried about it picking up or just a change of appearance? Obviously anything added to it will create a raised section, I'd be tempted to glue it down with some silicone (assuming it isn't) and leave it relatively flush.