A nice idea is to have the reading (or part of) from the Wedding on the scroll, and match the colour theme of the Wedding with the ribbon on the scroll and box.
Below is a very popular reading used in Wedding ceremonies.
Love is patient, love is kind. It does not envy, it does not boast, it is not proud. It does not dishonor others, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. Love does not delight in evil but rejoices with the truth. It always protects, always trusts, always hopes, always perseveres.
1 Corinthians 13:4-8 NIV 2011