Seasons Umbrella Recolor Help - Please

I am trying to learn how to recolor the umbrella that came with Seasons. I have follow the steps on getting it to work in game and that is working well. It's the actual process of the recoloring itself. I made a pink swatch but it is extremely shiny. Is there any way to do matte colors?  Here is how it looks right now Here. I want a more of a millenial pink color but also matte. I would love to have some basic shades in my game to go with all outfits but also some fun colors too. I am just not sure how to go about doing that. I used photoshop and just created a layer with the pink I wanted to use. I tried changing the layer style and opacity but then I could see the polka dots and that isn't exactly what I am looking for. Any suggestions?