Spine doesn't do vector, though you can do something similar using meshes. For example, you can use a small image that is entirely white and create a mesh for it. You can then bind it to bones so you can bend it around, and you can tint it any color. You could build up a whole character using this technique and it would render accurately at different resolutions. There's a single color example here, where the growing rose is done that way:
(but don't watch the video any farther, cringe! :p)
