Engagement photos attire

Definitely up to you! I’d recommend to go with styles that are very “you” for the two of you. If you’re not into pastels and like the bold colors (or vice versa) go for it!
Also a good thing to keep in mind would be where the photos are being taken. Scenery can help guide your choices.
Take a look at your photographers portfolio for inspiration. If it’s not readily available on a website, call or send an email and I’m sure they’ll be happy to share

Do you get an outfit change? We had one outfit change and so we did dressier clothes (I wore a long flowy dress and he wore khaki slacks and a button down shirt) and then we did a more casual look with jeans and sweaters (we did pics in the fall)

What do you feel prettiest in? Some couples have clothing changes but that cuts into the time spent with the photographer. Wear whatever you love that suits you. If don’t normally dress up, stay true to that and wear a nice top with jeans. Bright vs pastel is personal preference.

I'd perhaps ask the photographer about colors and go from there! If they have a location picked out that will be complemented by certain colors, I think that would be a good start. And your environment might inspire you to dress a certain way! 😊

If you're getting your engagement photos at a place that other people have too, you might want to look local photographers portfolios to give you an idea what other people have done. But what other people said as well, you want to stick with what you feel comfortable in.