'Set the color of the specified tick.
**Arguments:**
tick            Can be either an integer corresponding to the index of the tick
or a Tick object. Ex: if you had a slider with 3 ticks and you
wanted to change the middle tick, the index would be 1.
color           The color to make the tick. Can be any argument that is valid for
:func:`mkBrush <pyqtgraph.mkBrush>`'

def setTickColor(self, tick, color):

    tick = self.getTick(tick)
    tick.color = color
    tick.update()
