Dyable Leads

Have you ever crafted a lead and wondered why those slimeballs you combined with some string made a BROWN lead? And, more importantly, have you ever wondered why you can't have a BLUE lead instead? Well, of course you haven't, because I can't find any threads on this topic! But, if you just didn't make a thread about it and you have wondered, then feel free to leave a comment and build on this idea! I imagine that, to dye leads, you would combine leads with dye in the crafting menu, as well as being able to use glow squid inc sacks. This could really help add aesthetic to your farms, group boat rides, and even item frames. Several mods already have this, so why can't vanilla? Thanks for reading this, and I hope you like the idea!