I found this easy embroidery kit on Amazon.
This one uses the chain stitch for the orange, buttonhole stitch for the blue. The red was supposed to be backstitching but stem stitch made it stand out more. The centre was supposed to be the pinwheel stitch but I had done that on several other 'flowers' so I did some type of wagonwheel weaving stitch. It probably has a name but I don't know what it is.