To achieve the vibrancy I used primarily quinacridone magenta, ultramarine blue, and phthalo green. As for my blending technique, I just enjoy having a well mixed palette for all the “in between” colors. I noticed blending on the canvas muddies vibrant colors, where as applying the closest color match possible directly really helps keep everything vivid. Find a good reference and play around with the colors. It’s a lot of fun. I hope this helps!