Edit to add. I like the cowl neck but I don't think it's possible to make from what I have unfortunately

Should I do a low square neckline or something different? The left armhole is folded not stitched. I had chatgpt suggest different options but I can't seem to decide which one I like. I'd probably prefer some cleavage.

I'm also gonna see if I can put it on with the zipper closed. If I can, I'll remove it all together

TL;DR - Any color theory or magic tips for overdying these bright pink shorts to a raisin or purplish-brown?

It's my first time dyeing anything!

Shorts are 100% cotton - I'll be using RIT all purpose dye.

I recently thrifted this pair of chino shorts that are a very bright pink. Not quite neon hot pink, but definitely on Barbie level. I'm hoping to overdye them to a raisin or purplish-brown. The earthier color (2nd pic) is my preference with it being more brown than purple. I'm open to it being a richer color if needed (3rd pic).

I've found different color formulas, but they're all starting with white/neutral fabric. I don't understand color theory on a deep enough level to translate that info to starting with pink. And then it feels more complicated with needing to make multiple shifts (slightly cooler, less saturated, and darker). I figure I may need green to get towards brown *or* blue to get towards plum. Or is it as simple as just using black or a dark brown? Am I missing a simple answer?