I have a color and brightness picker (for some reason I can't insert images within this post due to some issue [I posted what I think is a bug on Meta], so I'll just link the picture): http://i.imgur.com/weYLmpY.png?1

It has been designed for touch interaction; you can scroll it horizontally. Now here's the thing: **How do I design a good indicator for the currently selected color?**

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I tried some things, but I don't think they do too well.

http://i.imgur.com/NNcGbgN.png?1

http://i.imgur.com/0EjLQbz.png?1


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I'd like it to be...

 - simple and clean;
 - the selection should be obvious;
 - nice looking

The selector doesn't move at all, it's just the inner part of the selector that moves when you scroll through the colors.

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Thanks in advance for your advices.