Chelsea shared this layout. I think it's a great example of using invitations in your layouts. The most important aspect is to make sure you use papers that will coordinate with the invitation. The pink shade that Chelsea used doesn't exactly match the colors on the invitation, but it coordinates - it doesn't clash with the shade.
I'm not a color guru, but I've learned so much about it since I started this journey with CTMH. For instance, this pink has purple overtones. They're not obvious at all, but if you put this pink next to one with orange overtones - like a salmon color - you would see a distinctive and often unpleasant difference.
In this case, while the colors aren't exact, the shading works well together with all the pinks being of the purply variety. The brown she is using is sort of a dark chocolate and also doesn't exactly match, but goes with the brown of the invitation. Browns also have shadings, from green to orange tones. This brown is rather green in tone, but not extremely. She embellished the brown cardstock with an impression machine that did a dry-emboss pattern on it. The "Love" label is from the Cricut, I think. I have the vague impression that it was a temporary label that she planned to switch out with something else, but I may be confusing her with one of the other guests. I think, if it were me, I would stamp the "LOVE" on some of the plain brown cardstock - that hasn't been impressed - in White Daisy. I would cut it out in an oval shape and maybe even edge the oval in the white daisy as well. Then I'd further accent it by raising it on a 3D foam square.
I really like this page! It is simplicity itself, starting with a solid, brightly colored base and having no other paper than a diagonally set design sheet. The only other papers on the layout are small-print mats for the pictures. What a quick way to introduce a section of pages from a singular event!