// Taken From: https://stackoverflow.com/questions/2241447/make-foregroundcolor-black-or-white-depending-on-background

var foreColor = (PerceivedBrightness(backColor) > 130 ? Color.Black : Color.White);

private int PerceivedBrightness(Color c) {
    return (int)Math.Sqrt(
    c.R * c.R * .299 +
    c.G * c.G * .587 +
    c.B * c.B * .114);
}