I like the whole idea, It's pretty sick to be honest.
But i'd say don't let people have multiply colored Dashes as default, Basically have all the colors and let it be single's as default ( no rainbow stuff ). If you wan't to make something new and unique then i suggest that you do it right, Meaning i'd add most normal solid colors

Code:
G/W = Default
White
Black
Red
Yellow etc etc

later on add different once and maybe upgrade to dashes with images in it like skulls, Crowns, Logo what so ever. I think this has a lot of potential.

But there should always be a option to be able to disable this, Also disable it for people who dislike all those colors ingame like in the 1337 option a tick box disabling the custom dashes.

If such option is going to be made make it like this.
Code:
- ☑ Enable custom Dash

- ☑ Disable all custom Dashes except yours.

- ☑ Disable All custom dashes including yours.
Something like this. There should be a varied of options so everybody is happy, You don't want to make something that would damage the image of GunZ overall, I'm pretty sure 70% of the community doesn't want to play with all those colors around and make it look like you're in some carnival parade. This stuff can be distracting as hell.

To avoid most problems the best way would be making it work with the value method.
Making a box placing #FD3F92 in it and it would generate automatically the colored dash but heck it is possible but a lot of work.

You can also go for rings.

Anyhow
If you guys manage something to replace the dash by using a item like a ring for example, Weapon skins wouldn't be hard too, This would be even sicker.
The possibility's are huge, that's what i think.

Sorry for the wall of text...