Programmatically tint a Support Vector

first of all you should use VectorDrawableCompat#create, once you have your Drawable you have to call DrawableCompat#wrap:

Potentially wrap drawable so that it may be used for tinting across the different API levels, via the tinting methods in this class.

so your code would look like this:

ImageView iv = ....
Drawable d = VectorDrawableCompat.create(getResources(), R.drawable.ic_exit_to_app_24dp, null);
d = DrawableCompat.wrap(d);
DrawableCompat.setTint(d, headerTitleColor);
iv.setImageDrawable(d);

Another handy solution with Kotlin:

fun Context.drawableWithColor(@DrawableRes drawableRes: Int, @ColorInt color: Int): Drawable? {
    val pic = ContextCompat.getDrawable(this, drawableRes)
    pic?.setColorFilter(color, PorterDuff.Mode.SRC_IN)
    return pic
}

Use is as simple as:

val drawable = context.drawableWithColor(R.drawable.your_awesome_drawable, Color.BLUE)

You can use setColorFilter method of ImageView:

imageView.setColorFilter(headerTitleColor, android.graphics.PorterDuff.Mode.MULTIPLY);