I'm using sublime on windows 7 and I noticed this behaviour while editing a reasonably large xml file (~1000 lines):


Lines 443, 445, 454, 456, 379 and 390 do not contain any color code but still get a colored circle in the gutter. I suppose it has something to do with the word 'constant' since it is present in every such line. I'm not aware of such color but I may be wrong.