Hi - some of it may dye, but much of it is undyeable. The upper body will surely dye. But most of the ruffle wont.
Sorry
:(
You can try, though. I just cant guarantee any success.

I do alot of dyeing. It really depends on the fiber content of the fabric used. Plant fibers (cottons, linens, soy, etc.) & plant based manmade fibers (rayons) are best dyed in an alkaline environment with a fiber reactive dye. Animal fibers (wool, silk, alpaca, etc.) and nylons are best dyed with acid dyes or fiber reactive dyes in an acid environment. Silk is the one that will dye under both acidic or alkaline environments but must be kept in alkaline environments as minimal as possible. Natural dyes require the use of a mordant in order to make the dye adhere to the fiber, except dyes with lots of tannic acid (tea or black walnut hulls for example). Natural dyes do not dye synthetics (nylons, polyesters, lycra, metallics).

Polyester is the fabric that is the most difficult to dye with readily available dye. Many try with a union dye like Rit but that stuff really does not work very well on synthetics.

So, if your fiber content is mostly cotton, a steep in a strong tea would be fine. If it is cotton with nylon lace, then you would have tea stained pants with white lace. And if there is any polyester content or lycra, your will get highly unpredictable results.

I personally would not ruin them and order another pair in the color that you want from Kathleen.

This inspired me to dye a white skirt I had. I wanted more of a antique burgandy color, so I brewed a strong pot of Lipton and black cherry tea. Poured it over the skirt in the tub. Not enough color I thought. Had an old left over giant bottle of Shiraz, poured it over the skirt. Not brown enough. Brewed an super extra strength pot of coffee, mixed it all around. Voila!!

Perfecto!!