Well, I for myself in 99% of cases rely only on documentation and I found it very sufficient. To be honest
I have sometimes feeling that you actually don't search or read the help file enough.
For example in your last windows question, it's clearly defined in the help file that:
TRANSPARENT - the window marked as transparent doesn't receive click events, all the mouse clicks go through
In the current case you easily see, that
"AlphaColor - in window object RGBA Specifies an
RGBA color of this object (overrides scene coloring); set to 0 to reset default behavior." and subsequential doc file search for RGBA reveals global function MakeRGBA(R, G, B, A)
"Packs the Red, Green, Blue and Alpha color values into one number"
So your answer would have been
some_window.AlphaColor = MakeRGBA(167,189,163,128);
Moreover even your question is wrong. You didn't understood the problematics of RGBA because in your first post you assume to supply for AlphaColor only 3 values which is pure RGB, you ommited the Alpha value which was probably the main reason why you tried this in the first place?
Also functionality of SpriteEdit is thoroughly discussed in the beginning part of the documentation (Inside a game) which explains how one should use the WME dev. Kit.
So don't get me wrong, but we're really trying to be helpful here, but shifting blame on Documentation without actually reading it is little bit strange. There is of course always room for improvement but we all have our own projects and so far nobody complains that much about documentation. WME also have a wiki page for tutorials et. alt. so those who think that the documentation is not enough can post their little tutorials too.
The problem as I see is that you would like to have the basic gaming / graphics / programming concepts explained or being provided with fully functional code. Then the question is, why won't you get a help of some programmer who would put a lot of stress from you?
Bottom line is that I don't think putting full code examples into doc would be that helpful, because even then people will keep complaining why this code snippet for this or that is not provided until the documentation won't contain the full code for the whole variety of games.
I don't want the whole tone of this post to sound harsh at all. I just wanted you to look at things from a bit different perspective. It's usually much better to understand concepts and then coding them than mindlessly copy/paste code ala MSDN and then crying about unfunctioning code because of the lack of understanding.