Changing food colour in inventory

[Psieye]

# Food is colour coded by default as follows:
<snip>
# You can change colours by using something like
<snip>

I'm trying " $inedible := cyan" so rotten chunks aren't so hard to read in my inventory (local tiles). I've tried "=" and "^=" as well but none of them make it happen. Is it possible to change the colour of chunks in the inventory?

Edit - found answer: "menu_colour ^= inventory:cyan:inedible"