Type Default Value Read Only Static Description
Byte None No No Gets or sets the black component in CMYK - a percentage value between 0 and 100 representing the amount of black ink.

This is synchronized with the indexer (this[i]) and shares the value with Gy . However because Gy varies from 0 to 255 and K from 0 to 100, the values will be different even though the underlying intensity component is the same. Do also note that the K value represents the darkness of the color whereas the Gy value represents lightness.