We say that a finite set of red and blue points in the plane in general position can be K1,3-covered if the set can be partitioned into subsets of size 4, with 3 points of one color and 1 point of the other color, in such a way that, if at each subset the fourth point is connected by straight-line segments to the same-colored points, then the resulting set of all segments has no crossings. We consider the following problem: Given a set R of r red points and a set B of b blue points in the plane in general position, how many points of R∪B can be K1,3-covered? and we prove the following results: (1) If r=3g+h and b=3h+g, for some non-negative integers g and h, then there are point sets R∪B, like {1,3}-equitable sets (i.e., r=3b or b=3r) and linearly separable sets, that can be K1,3-covered. (2) If r=3g+h, b=3h+g and the points in R∪B are in convex position, then at least r+b−4 points can be K1,3-covered, and this bound is tight. (3) There are arbitrarily large point sets R∪B in general position, with r=b+1, such that at most r+b−5 points can be K1,3-covered. (4) If b≤r≤3b, then at least 89(r+b−8) points of R∪B can be K1,3-covered. For r>3b, there are too many red points and at least r−3b of them will remain uncovered in any K1,3-covering. Furthermore, in all the cases we provide efficient algorithms to compute the corresponding coverings.