(g − i) colour vs. stellar mass diagram for all galaxies in the GAMA G02-XXL overlap region. The red line denotes a linear fit calculated by fitting Gaussian curves to the red and blue populations. We consider galaxies as blue if they lie below the linear fit, and red if they lie above it. The solid black line denotes the mean mass of the ten faintest galaxies to our M_r = −21.1 mag limit, corresponding to log(M_stellar/M_⊙)≈10.10.