I'm a longtime GemX user, just installed DoogiePIM. I customized the theme to my preferences but I do have a suggestion on color handling of the hover on the toolbar items. The hover color is a little too dark. If you use the captions under the icons, the text is very hard to read. Putting on my accessibility hat - the color contrast is not sufficient, so some users with low vision will have particular difficulty with this. I tried different color schemes, it doesn't really matter, the hover color is still too dark.
Perhaps more transparency, or a different hover style choice?