Maps of the reflectance slope between 500 and 850 nm, normalised at 600 nm for WFM observations. The maps are oriented north up and east left. The direction of the Sun is indicated by a red arrow and a scale bar is shown in each panel. The time above each map is the average time of the stack; the reflectance slope indicated by the colour bar is expressed in units of %/100 nm. A cut-off was applied to mask spaxels with little to no target signal.