No, you're just doing it wrong. Item variants for the antique wardrobe are controlled by value. RyDog's code for changing quantity works fine for this, I just tested. 00 is brown, 01 is yellowish (like yellow wood), 02 is super dark.
And besides that, this thread is not for help testing RyDog's cheat. If you used my generator and put in the id for that wardrobe and the ID of your choosing, it would work fine.
Wanted to say thanks for keeping up with my annoying ass. Took what you told me and went back through the post and got it working, turns out there's more key combos with the code than was included in the original pastebin, tried that and it worked great. For anyone else who may come across this, after generating the item using Rydog's cheat, open chat again and type the quantity value (1, 2, etc) and after submitting press ZR+Dpad Left, it'll change the item in slot 1.
Thanks Mopquill!