@joinfurther,
You can pass the color within single quote to set the font-color of the text shown in tooltip as shown in the code-snippet below:
contentFormatter: function (e) {
var content = " ";
for (var i = 0; i < e.entries.length; i++) {
content += e.entries[i].dataSeries.name + " " + "<strong style='color: red;'>" + e.entries[i].dataPoint.y + "</strong>";
content += "<br/>";
}
return content;
}
—
Thangaraj Raman
Team CanvasJS