Coloured maggots,speaking as a matchman my son and I fish open matches every Sat&Sun during the coarse season.Always take 1pt each of mixed maggots,reds yellows whites bronze and discos 1pt in total.
You would be amazed the way fish will respond to different colours ,at certain times.Experimenting is essential!
One final comment greens seem to be getting a tough time,whilst I would agree the other colours outfish them generally,try them in summer when caterpillars are falling from an overhanging bush,deadly.