I believe at one time the word Red was used in reference "to brighten" or the word meretricious comes to mind. It could mean alluring or attractive in a flashy way. If you think of a Red Light district you have Ladies of the Evening dressed accordingly to attract customers.
> One I have never been able to track down and figure out is 'red
> up,' my mother would say 'I have to red up the house before so
> and so gets here,' meaning she was going to pick up, straighten
> up, clean, the house. I haven't a clue where that came from or
> how it came about.