Selected colour-colour and magnitude-colour diagrams of VEXAS high-confidence (p_class = 0.7) STAR (red contours), QSO (green contours), and GALAXY (blue contours), for only objects without missing magnitudes, over the three optical footprints (VEXAS-DESW, left column; VEXAS-PSW, middle column; and VEXAS-SMW, right column), split according to the predicted class. While, for the first two tables, the situation is unchanged with respect to Fig. 7; for the VEXAS-SMW, the separation obtained without imputation is much more net between the three classes.