In v1.43 is the ability to separately color the vertical rulers.
See issue Support multiple rulers with different colors - (in settings.json):
"editor.rulers": [ { "column": 80, "color": "#ff00FF" }, 100, // <- a ruler in the default color or as customized (with "editorRuler.foreground") at column 100 { "column": 120, "color": "#ff0000" }, ] "editor.rulers": [ { "column": 80, "color": "#ff00FF" }, 100, // <- a ruler in the default color or as customized (with "editorRuler.foreground") at column 100 { "column": 120, "color": "#ff0000" }, ] To change the default color for a ruler:
"workbench.colorCustomizations": { "editorRuler.foreground": "#fffa" // or "#ffffffaa" - the a's are alpha transparency values } "workbench.colorCustomizations": { "editorRuler.foreground": "#fffa" // or "#ffffffaa" - the a's are alpha transparency values }