27d7da41_mGeoJSON___University_Map_Wiki__lines
[property name] color [filled shapes] colour with which the shape is filled [notes] any CSS colour specification is allowed, e.g. a name like 'green', hash and six hex digits, or 'rgb(...)' etc. Default is tomato (a bright-ish red). Note US spelling of color. [lines] 
colour in which the line is drawn (note: stroke-color overrides this)
UCamGeoJSON - University Map Wiki
lines