Green, if the amount (i.e. planned budget minus all amounts On Approval / On Review / Approved) is higher than or equal to zero
Yellow, if the amount (planned budget minus all amounts On Approval / On Review / Approved) is below zero
and
the amount (planned budget minus Approved Bills/Expenses minus Bills/Expenses On Approval minus Bills/Expenses On Review) is higher than or equal to zero
Red, if the amount (planned budget minus all amounts On Approval / On Review / Approved) is below zero