Don't know about the ants, but the pink is picking out the pink in the centre beautifully on my screen. In the grand scheme of things, I doubt if it would notice that they are ants, it would just come across as a tiny print.
I got Ninnie's centre this lunchtime, and ditto the comment above, it is so much nicer in the flesh than in the pics she had posted. The colours of prints she has used are more vibrant, and lots of oriental prints, with touches of gold too. I've designed her border, and got the go ahead from her to try it, but not started yet. I am still mulling a bit. At least it isn't mute like poor Elle's last IRR. Can you post a pic somewhere Elle, so we could 'help' with suggstions?