What does "go with" mean?

No matter what, always go with the right side even if it’s against someone you love, it’s about honesty.

Hi

I have a pants but till now i didn’t find a t-shirt goes with the pante.
Is it right sentence?

when you want to go with (2d or 3d meaning) the color of your clothes, you have plenty of choices. however, some of these colors go with (first meaning) each other more, it’s useful to know about them, we have 3 main colors: RED,BLUE,YELLOW any of these color goes with combination of the other two colors, for example, combination of red and yellow is orange and the rest color is blue, so blue goes with orange, it’s a general rule in painting, it’s my own exprience:

white ~ every colors especially red, black, blue, orange/gray ~ orange and black/blue ~ orange or dark yellow/ green ~red or orange/ purple ~ yellow and so on

u can go with your sister to the party:)