Here's everything I have in my stash right now. I fear I don't have enough of the same color for the main yarn C. Should I buy? Should I use different colors for C? Any color suggestions would be welcome as well.

Dont know if I'm being too bold here!? Planning on mixing yarns all ways in cat C, so none of these will be knitted alone. A combo between them all. I love the coral but dont know if its too strong for the grey? Will add another similar colour to the coral for variation. Very excited to see other people's colours selections ♥️ Any feedback gratefully received 🤩