Toast displayed white in colour

[pallikondan]

my code snippet

window.plugins.toast.showWithOptions(
{
message: "hey Palli",
duration: "long", // which is 2000 ms. "long" is 4000. Or specify the nr of ms yourself.
position: "center",
addPixelsY: -100, // added a negative value to move it up a bit (default 0)
backgroundColor: '#333333', // make sure you use #RRGGBB. Default #333333
textColor: '#FFFF00',
textSize: 20.5, // Default is approx. 13.
cornerRadius: 10, // minimum is 0 (square). iOS default 20, Android default 100
horizontalPadding: 20
},

Even I change the background color to black
i'm using google pixel (Android version 8.1 - oreo)