the files that probably need to be changed are position-direction.svg and the variants for the dark maps (white and magenta). In particular, I often have heard complaints that its hard to see the blue marker on the blue line, and such. So, we need to make it to ensure visibility. Now, I like Osmo's icons a lot and would be nice to keep the them as a visual identity. So, its some patch on top of them, I guess. It would probably make sense to start with the blue version only and see where it brings us. The dark version variants can be swapped later. PS: no rush this time