Spot-tone to match your paper. #3 is best for most.
A pice of old paper
Spit... yes spit
Shake bottle (slightly) take off lid.... put open bottle in another room (if not you will spill it on your nice print)
Use fine bush to to get spot-tone from lid, and mix with spit and build up the tones to match. Don't do it all at once.
You can buy two sable brushes and a bottle of spot-tone for less than those markers and if you don't spill the spot-tone it will last forever.