Following Dot custom color

[ZTF666]

I had the pleasure of implementing the trailing effect for one of our internal demos for a product and i got asked the following question so often : 'is it possible to change the color of the dot ?' , so i decided to make it happen lol .
I added a couple of lines to make custom colors possible for the following dot .
Cheers ,ZTF

[tholman]

Nice! Looks like the default color maybe doesn’t have its opacity any more though, fix that up and I’ll merge in!

[ZTF666]

Thank you !
Correct me if i'm wrong , the opacity can be set through the hex value of the color if needed !? if i recall, the hex color representation does support the addition of an alpha value i.e : #RRGGBBAA .
So if for example if i choose a black color : #141414 i can add opacity to it by doing something like : #14141450 , thus making the dot have its opacity if needed .

[tholman]

Right! The old default was rgba(50, 50, 50, 0.65) and in this PR its #5b5b5b, would like to keep that opacity on the default either as rgba(50, 50, 50, 0.65) or the hex with the alpha

[ZTF666]

Alright ! it has been done , thank you for the feedback 🙌.

[tholman]

Thanks! Will do the npm deploy when i get a minute, but this is all great.

[ZTF666]

Thank you ! cheers 🎊