I approach this different from any of the other replies. It's not better or worse, just mine.
First I start with what I want to have the most notice. On this block it would be the start points. I'd assign that the brightest, most vivid fabric of my choices. From your fabrics that would be either the center pink or bright yellow.
Second, to make those star points stand out, I'd give the most value and intensity contrast next to this. So the triangles outside those star points would be........Black or the dark blue.
The inside square is a significant support player; large pattern.
So that the half square triangles wouldn't call great attention, I'd use the light blue. (If the star points are pink/red than these half square outer triangles could be a soft yellow.
The outside ring is good the way it is.
The outside corner triangles could be the spotted yellow.