Jeff,
Love you work so far!
Adding on here. You've used cool tone a lot with your $1 and $25, so I think you need to go a little warm on the five. A red base is good. Green/orange and possibly yellow hues will work best I think. There is some hesitation with red/orange/green for sure, but its been done with striking results. Check out the nooksack $5 chip for reference point. (defunct WA casino). To tone it down, a variant of the old Taj Majal $5 also suits the bill and uses white. That means using that awesome gray on the $1. Hope that is helpful. Love this part! Have fun!!!
Bert