Thanks for the clarification! If I didn’t know the context, your first comment here this morning would have had me concerned.
Awesome that you are keeping your priorities in mind, even as the rest of us throw crazy fun colorful tops at you. I see now what you mean about the wardrobe hole, and you’ve mentioned before that essentials and “quiet” things are harder for you to buy, because they aren’t as exciting/fun.
You can wear the more formal shirt you started with and this skirt (or jeans) together, of course, and both pieces will work well with other things in your wardrobe. But if you want to put them together in an outfit that has zing, I think you need a third piece or a scarf or something else to add the energy against the background these pieces provide (because they are essentials).
How about saving the shirt for next month, and getting a different light neutral essential top to go with the skirt? I think a softer fabric, like linen or shantung silk, might work with it. Is that something you could also use elsewhere?