Portable low-pressure airless sprayer

A handheld portable airless paint spraying system comprising:

• a portable body;
• at least one battery;
• at least one paint source removably coupled to and carried on the portable body, the at least one paint source containing a plurality of paints, each paint, of the plurality of paints, having a different color than another paint in the at least one paint source;
• a spray tip;
• a paint pathway configured to carry the plurality of paints to the spray tip;
• operable to pressurize at least two paints, of the plurality of paints, to generate a pressurized flow along the paint pathway;
• a sensor retaining device;
• a removable color sensor removably received by the sensor retaining device, wherein, when received by the sensor retaining device, the removable color sensor is carried on the handheld portable airless paint spraying system;
• a wireless communication system that wirelessly receives, from the removable color sensor, a sensor signal indicative of a target color;
• and
• a control system powered by the at least one battery to receive the sensor signal indicative of the target color and to generate a control signal, based on the target color, to control a respective flow rate of each paint, of the at least two paints, along the paint pathway to generate a mixed paint sprayed from the spray tip, the mixed paint having a color resultant from a mixture of the at least two paints of the plurality of paints.