Your commissioned blade has been completed. The forging went greatly, I made use of silver for the base of the blade and cooled it with the provided holy water to achieve your goal of potency toward undead. You will find that the blade has been stained blue via a molten alloy of lapis lazuli and diamond. The reason for this is simple, quite literally everything you own is blue in some shape or form and should you use a diverting shade I feel that not only would the blade look atrocious, you would look atrocious as well (not to mention this will assumably increase it's durability and inclement to the arcane).
I will be arriving at Serenity shortly to deliver the cutlass and accept my payment. If you wish to continue the project it will be discussed there.