This card uses the Just for You stamp set - love it! I did this last year so I don't recall what colours I used to stamp but they would have likely been Indian Corn Blue and Sweet Leaf since that is all I would have had at that time.
The 'Happy Birthday' I believe is from the Art Philosophy set Collection of stamps. The flower shape was cut from Art Philosophy at 2-1/2" and the centre of the flower at 1". I don't recall the size of the leaves. And then a white gel pen for the stitching.
Have a great day!