Invitations

My theme is a fall theme. Before I even had my color scheme I had found a brown invitation with gold writing and a gold now which I liked very much and I was going to put a fall leaf in the bow so when they opened the bow the leaf would fall.

Now that I have a color scheme of purple, burnt orange, with gold accents I'm lost. I really like the invitation but it doesn't come in purple. I'm having a hard time finding invitations with purple that I like.

Does my invitations have to match my color scheme or would it look ok sending brown invitations and then having everyone surprised the day of the wedding with the color scheme?

If you like those original invites I think it's totally fine to go with them. I don't think anyone would notice, especially since it's all fall-ish. To be completely honest, I never noticed people invitations until I started planning a wedding