Mary's color blocks

After I wondered about what color envelope Mary started with (below) she sent me this comment - which she tried to leave in the comment section - but Google was not cooperating - so here is what she had to say:

You were right about the color block envelope. I started with a white one for exactly the reason you said, so that the colors wouldn't be muddy. I used a sharpie for the black lines. I did some where I added white dots with a gel pen in the black that looked neat. I think you are getting one like that this month. Just remember to put a liner in the envelope if you do this one so that it doesn't bleed through.  

 Mary's fifth (and final) envelope in this series is one that could be used in many different ways. Mary chose black plus 4 colors - from the stamp. Any stamp with at least 3 colors could work for this. The design could also include a shape in the corner that was a border for the stamp. If (when) I appropriate this idea - I know I will write the name and address first and then box it in. 

Mary sent this image - so I can't examine it and see if she started with a white envelope. I like that there is no white left on the paper. It might have been a yellow envelope. I have some yellow envelopes so I might see if I can make this work on yellow - no - I miscounted the colors. I didn't count the turquoise. There are 5 colors - and unless you had paint pens - layering turquoise over yellow is probably going to make a muddy color. Even that dark purplish blue would be a challenge.

I'm pretty sure I am going to try this with a white envelope and maybe even work in some white as one of the colors. Or how about a black/white/gray design. There are many ways to go with this one.

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So how did I do on my test run - to see if I can adhere to my new plan to schedule posts and do it in an orderly fashion? So far - I get an A+. I emptied a folder and I did not do any jumping around. I'm not confused. Although, I might be unaware of confusion - which sorta makes not-being-confused - out of my reach. And my head hurts just thinking about how that works.