To Stuck Again. I hope you do not mind me playing with your sketch. I really liked the basic layout so I just played around with it and this is what I came up with.
I added the turquoise eyelets to the upper right area so it did not look so bare. I actually could have gone with more white rubons but I did not think they would show up enough.
I used a stripe paper for the center of the card in the same family and just backed it with certainly celery card stock. I used scissors to notch the corners. I then used the scallop punch on tempting turquoise and 1-1/4" circle for the center. You can stamp just about anything in it. I needed a get well card so that is what I stamped. I should of sponged around the white circle but I had already stuck it down.
I hope you don't mind my creative license with your sketch. Happy Stamping, Paula