Custom color scheme for spatial plot does not seem to work

[smk5g5]

I was trying to work with my spatial data and I am not able to make a custom coloring scheme work with spatial data? What am I doing wrong?

SpatialPlot(object = scrna, features = i,images='B172.01',cols = c("grey88", "firebrick4"))

[timoast]

cols entry from the SpatialPlot() documentation:

Vector of colors, each color corresponds to an identity class. This may also be a single character or numeric value corresponding to a palette as specified by brewer.pal.info. By default, ggplot2 assigns colors

So cols = c("grey88", "firebrick4") is not a valid parameter choice here for plotting a feature