Regarding the property of the "strong force", here's some mainstream spiel from our good ol' friend Wikipedia:-
The contemporary strong force is described by quantum chromodynamics (QCD), a part of the standard model of particle physics. Mathematically, QCD is a non-Abelian gauge theory based on a local (gauge) symmetry group called SU(3).
Quarks and gluons are the only fundamental particles which carry non-vanishing colour charge, and hence participate in strong interactions. The strong force itself acts directly only upon elementary quark and gluon particles.
All quarks and gluons in QCD interact with each other through the strong force. The strength of interaction is parametrized by the strong coupling constant. This strength is modified by the gauge color charge of the particle, a group theoretical property.
The strong force acts between quarks.
The residual effect of the strong force is called the nuclear force. The nuclear force acts between hadrons, such as mesons or the nucleons in atomic nuclei. This "residual strong force", acting indirectly, transmits gluons that form part of the virtual pi and rho mesons, which, in turn, transmit the nuclear force between nucleons.
The residual strong force is thus a minor residuum of the strong force which binds quarks together into protons and neutrons. This same force is much weaker between neutrons and protons, because it is mostly neutralized within them, in the same way that electromagnetic forces between neutral atoms (van der Waals forces) are much weaker than the electromagnetic forces that hold the atoms internally together.
With regard to "forces" which attract and repel; it seems that ultimately there may only be one force in space that governs the behaviour of matter. How matter is arranged and configured in spatial dimensions - certainly seems to govern the strength of whatever repulsive or attractive "forces" are present. Some may call it "electricity" or "gravity" or "weak force" or whatever - depending on the context. But I personally feel that there is probably only one force out there. I may be wrong, of course. I don't pretend to know how this beautiful universe works.