Australian Shepherd - marking color updates?

I remember a long time ago a mod saying that Australian Shepherd and Border Collies would not be redrawn (someone was asking about it in chat) and I understand that redrawing these breeds would mean redrawing ALL the items as well so I was thinking of other ways to bring new life to these breeds ones that wouldn't involve redoing their items, here is an example of what I mean, I noticed a bit of a problem when I tried making a blue merle tri-color Aussie custom.

This is an Australian Shepherd with a blue base coat, Tan 4, black blotches at 100% opacity and a white marking... just because I like white markings,


As you can see the black blotches are invisible on the blue base coat, this is also just personal preference but I'm not a fan of the particular shade of tan it looks a little dull to me and I think a brighter shade would really make a difference.

Here is an altered version, same markings but I've darkened the Black blotches and changed the tan color to a brighter shade,


If I could make an Aussie like the one above I sure would (probably several with varying coats) and I'm sure I'm not the only one who would make Aussie customs if the colors were a little more eye catching :)

I think Border Collies could also possibly look nicer with a little recoloring (I don't collect those so I don't know for sure but I think they have similar colors)

EDIT: Please browse through other users comments to see suggestions of how this could be done without changing existing dogs.