Tower Of Latria, Upper Latria
Make your way through the area until you have knocked the heart down (story progression) then, if we go from the archstone to get your bearings, head straight down the pathway. Take a right then an immediate right once you’re outside, smash through the vases and down the stairs, head right back into the building and right again pass the heart. The first corpse you come to will hold the Gold Mask, collect this then take it to Sparkly the Crow in the Shrine Of Storms, Island’s Edge (head up then left into the passage, go up the stairs and take the first left, drop down, climb the stairs, take the first right and follow the path to the tree)
Once at Sparklys’ location, drop the Gold Mask then save and quit the game, reload in to collect the Colorless Demon Soul