We made Subsilver the default style for this board because it was similar to the old board in look and icons. And, frankly most people I have asked like Subsilver better than Prosilver. Just having the Avatar and profile info on the right instead of the left discombobulates many of us. And many just do not like the cyan and while lettering of the headers or even the hover effect.
The nice thing is that it is very easy to change the colors. EG, I changed the rollover or hover color in the forum list and topic list to a light green from an 'orrible cream color. I am not satisfied with the precise shade of green, but was just playing in order to figure it out. Ultimately I would like to have both a blue and a green style, as well as an 'OBOD' style.
For the blue I was thinking making it more indigo, less cyan, less bright and perhaps use something besides white for header lettering and changing the red in the icons and poll bars to a more earthy orange. But i am not very good at design and color coordination.
I would like to suggest that you try out Prosilver just to get a feel for how it works and suggest some coloring schemes, including th hex numbers for the colors if you know how to do that. For this we need not limit ourselfves to "web-safe colors" which, IMO is passé.
To change to Prosilver choose User Control Panel->Board Preferences->My Board Style->prosilver.
Please let me know what you think and thanks,
Kernos
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) This is because any anti-aliasing of the edges has to be either dark OR light. The smilies and other icons that look good on both backgrounds will have zaggies on the edge, or are so small one can barely see the zaggies. 
006600/FFFF99 works better (again for me), though I would desaturate the text too about FEFFB9 or even FEFFDC or so as it provides more contrast, but is still yellowish. (notice I do not limit things to websafe colors. Since most people are using 24 (millions) or 16 bit )thousands) colour settings, I no longer consider 8 bit (256 of which web safe is a subset) color limits necessary). Note too that phpBB 3 does ot limit itself to web safe colors. 