I discevered this about one month agon and I more os less saw it's power...
Try Red List1[1]...
It works for me. But the syntax is somehow odd.
I would expect that this command will display number stored in List 1[1] by red color.
Similar to
Red "Hello"
I would define syntax for observed behavior like
Red->Color List 1[1]
(where Color is new command). But Casio dev designed it this way :-(