A custom color printhead module for use in an inkjet printing device, the custom color printhead module comprising: a mixing reservoir having a first opening and a second opening, the first opening being configured for removable connection to a first ink source for supplying a first colored ink having a first color, the second opening being configured for removable connection to a second ink source for supplying a second colored ink having a second color, the second color being different than the first color; a first dispenser operably connected to the first opening, the first dispenser being configured to open and close the first opening to enable and disable a flow of the first colored ink into the mixing reservoir; a second dispenser operably connected to the second opening, the second dispenser being configured to open and close the second opening to enable and disable a flow of the second colored ink into the mixing reservoir; an ink mixer positioned within the mixing reservoir and configured to mix the first colored ink and the second colored ink within the mixing reservoir to form a custom colored ink; a printhead operably connected to a printhead supply opening of the mixing reservoir to receive the custom colored ink from the mixing reservoir; a reservoir dispenser operably connected between the printhead supply opening and the printhead, the reservoir dispenser being configured to open and close the printhead supply opening to enable and disable a flow of the custom colored ink from the mixing reservoir to the printhead; and a housing configured to support the mixing reservoir and the printhead, the housing being configured for connection and removal from an imaging device while supporting the mixing reservoir and the printhead. a mixing reservoir having a first opening and a second opening, the first opening being configured for removable connection to a first ink source for supplying a first colored ink having a first color, the second opening being configured for removable connection to a second ink source for supplying a second colored ink having a second color, the second color being different than the first color; a first dispenser operably connected to the first opening, the first dispenser being configured to open and close the first opening to enable and disable a flow of the first colored ink into the mixing reservoir; a second dispenser operably connected to the second opening, the second dispenser being configured to open and close the second opening to enable and disable a flow of the second colored ink into the mixing reservoir; an ink mixer positioned within the mixing reservoir and configured to mix the first colored ink and the second colored ink within the mixing reservoir to form a custom colored ink; a printhead operably connected to a printhead supply opening of the mixing reservoir to receive the custom colored ink from the mixing reservoir; a reservoir dispenser operably connected between the printhead supply opening and the printhead, the reservoir dispenser being configured to open and close the printhead supply opening to enable and disable a flow of the custom colored ink from the mixing reservoir to the printhead; and a housing configured to support the mixing reservoir and the printhead, the housing being configured for connection and removal from an imaging device while supporting the mixing reservoir and the printhead.