WindowBlinds7 custom colors functionality limited?

Prior to WindowBlinds7 a user could change the colors of just about anything in a given windowblind. For example, if a given skin was originally authored to have a black window with white text, I could change those settings so that the window color would be white and the text black. If I wanted to change just the "button face" color, I could easily customize just the "button face". Heck, I could even adjust how light/dark the entire skin is.

Ultimately, previous versions of WindowBlinds allowed a user to create their own custom substyles.

But in WindowBlinds 7, it appears a lot of user-customization has be stripped out. Changing colors of a skin is now globally done to everything in a given skin, or that's how it seems to me. Can't lighten/darken a skin. Can't invert colors.

So, I'm wondering if Windowblinds 7 actually has the desired customization features but I haven't yet found them?

--Pete