I don't think these small red and yellow boletes represent anything in the bicolor complex. The cap color is a different shade of red than I associate with bicolor, a dark blood-red. The cap surface bruises blackish. Very little bruising/staining on other parts of the mushroom. Doesn't seem to fit the profile of either sensibilis or pseudosensibilis either. Rubellus/fraternus seems very unlikely, as well.