Hi and welcome. How about a picture? I looked up your 'Blushing Turtle' geraniums in our database but there's no picture. Are the flowers pink?
It's really up to your personal taste. The rich golden yellow of the Stellas goes well with a lot of other colors, but I personally wouldn't choose pink with them. The leaf textures together will be wonderful though.
How about some blue Salvia in between as a 'buffer' ? There are a lot of gorgeous blue and purple Salvias