[css] add 'grey' colors and missing keywords
[css] add 'grey' colors and missing keywords
hackmdio/CodeMirror,pabloferz/CodeMirror,hackmdio/CodeMirror,dperetti/CodeMirror,nightwing/CodeMirror,pabloferz/CodeMirror,dperetti/CodeMirror,hackmdio/CodeMirror,dperetti/CodeMirror,nightwing/CodeMirror,pabloferz/CodeMirror,nightwing/CodeMirror