Android:未聚焦时,更改材料的提示文本颜色,以显示暴露的轮廓下拉菜单

I am trying to change the hint color of a material exposed dropdown when its not selected or unfocused. I am unable to find the exact method that can do this. I have been able to change pretty much everything according to my liking except that. Can somebody help me with this?

Active State

Inactive State