Color matching holds great optimization potential! As a world's first, THETA Print already realized color matching during running production compatible to offline spectrophotometers in 2011. Import the offline spectral values of the customer's proof with your available device and measure inline with spectraCon the printed color immediately with start of printing. With help of a color matching software an ink formulation is calculated so that the required color value is reached within shortest time. Additionally, the whole running production will be controlled. The printer will be alarmed when color deviations appear and is asked to correct the color. After the production run a quality report can be provided as proof for your customer, spezified for every roll. As a result, substantial savings during makeready, a reliable production during the whole print run and satisfied customers with low rate of complaints due to color deviations, can be achieved.