Column padding can be done with .ico files, too. For 16 and 256 color images each line of data must be a multiple of 4 bytes. And since 16 and 256 color images

Column padding can be done with .ico files, too. For 16 and 256 color images each line of data must be a multiple of 4 bytes. And since 16 and 256 color images are required to be included in ico images, the low color resolution does not even raise suspicion.