I created an icon theme for plasma but this is not the issue is not 100% complete but does not work practically any icon, I leave the matter in case anyone wants to download and check it out.

https://mega.co.nz/#!25lmTCja!JfIugOz1GrkEJhaIFk_znCjthdETjf2_PGY1YM2SvXg

To create the subject I have relied on the breeze topic.

A greeting and thanks in advance

Hello,

Many of your icons have extension *.svg while being PNG files. Just rename them to *.png.

Louis

Also in the dolphin's side bar: http://wstaw.org/m/2015/08/12/plasma-desktopeo3844.png
if icon size is large enough
(don't ask me why it is red )

tanks!!