1. A method of continuous color calibration of a printing device, the method performed by a processor of the printing device and comprising: in a normal operation mode, executing print jobs based on pre-calibrated color values; in a continuous color calibration mode: (a) printing first color outputs in a start phase of the continuous color calibration mode; (b) measuring the first color outputs to determine target color values for a print job; (c) storing the target color values; (d) printing current color outputs within a print area of the print job; (e) measuring the current color outputs to determine current color values; (f) storing the current color values; (g) calculating color compensation values to compensate for a difference between the target color values and the current color values; (h) storing the color compensation values; (i) continuing the print job using the color compensation values; and repetitively performing steps (d)-(i) across the print job, such that color compensation values are repetitively recalculated during the print job, and portions of the print job are printed using the color compensation values, wherein the color outputs, the first color outputs, and the current color outputs further comprise strips of color patches printed on respective print sheets, outside of a print area, and wherein the color outputs, the first color outputs, and the current color outputs are measured using an image sensor of the printing device.