User blog comment:ThatOneAsianGamer/Dying the Ninja Costume./@comment-5327869-20131105144619

Try using the "Intense Dye" variant of the dyes you are trying, black and silver are automatically "intense".

Example:

Instead of "Red Dye" use "Intense Red Dye"

Instead of "Flame Dye" use "Intense Flame Dye"