Force colour scheme across charts

Hi, It would be really useful if you could pick the colour of the various categories showing on a chart. e.g. I have two pie charts, both showing the same categories, in this case called 'Land' and Grid', but on one pie chart 'Land' is the bigger % and therefore shown as blue (while 'Grid is shown as grey), and on the other pie chart 'Grid' is bigger, and therefore also shown as blue (while 'Land' is shown as grey). When you look at this side by side on a Dashboard it's really misleading!

It would be good if 'Land' could always be one colour and 'Grid' the other, by being able to select the colour

Thanks!