Ok, it's this Levels layer:
RGB channel: 0/1.16/255 and 0/255
Red channel: 0/0.59/255 and 0/255
Green channel: 0/1.10/255 and 31/221
Blue channel: 0/3.08/255 and 0/1.87
If I've done my job properly, you'll find that you don't need very much precision when masking around the spikes.