Design and color

 I've been thinking design thoughts lately.  Partly that's because one of the things I miss from my rugweaving days is working with color.  And partly because I've started adding some gold to my pieces and the price dictates that I get maximum impact for the colored (i.e. gold) tubes I use.
First conclusion I've reached--always subject to change--Where a piece has a really interesting shape, and particularly an interesting outline, like the first piece shown, it works quite well in just oxidized silver. I could add areas of color if I wanted, but I don't have to. This would apply to my charm pieces as well.  But where a piece is really regular some color helps to break things up, like in piece 2. And I tend to like having the color offset, not at the center of things.
The next issue--placing the color.  If I use a lot of colored tubes, I can do whatever I want and it will show well, but the problem arises when I don't want to use so many tubes.  My regular and mathematical mind wants to use them to highlight the geometry I've spent so much time creating.  But doing that usually means distributing a limited amount of color over the whole necklace, and sometimes it sort of loses it's impact. In the 3rd picture I have a piece where I think that spreading out the color really works.  You just wouldn't see how the arms of the pinwheel spiral without those gold tubes indicating it. But more often I think that massing it, as I did in the piece with red tubes, is a better bet.  I'd love to get others' opinions on this.  What do you think?