I think its hard to judge with the model in the photo also wearing a lavender shirt. I'd recommend seeing if you can find any inspo pictures of brides with lilac eye makeup to get a better idea what it would look like with a wedding dress etc. Also this is a great opportunity to utilize your makeup trial and see how it looks on you on person, I'd also recommend wearing a white top/outfit to your makeup trial appt so you can visualize how the makeup will look with a white outfit, similar to your wedding dress.
I was looking at this eye shadow Our colours are purple too. I love it. I think if you want to have dramatic eyes like that it'll look great. A MA will be able to get a look that is perfect for you. Lol I'd never try to do it myself
I think that everyone is different and If you think you would like this style for your wedding day, Then go for it! It's your day and you shouldn't have to worry about what other people will think. You could go and have a trail run with this kind of makeup and see if you really like it before you say yes to this style