Ion Input Change Underline text Color Focus on particular input box

Ionic Framework ionic-v3
1

Hi all, Need Help for Ion Input Change Underline text Color Focus on particular input box.
anyone share scss or css for change color input box .

2

html:

<ion-input type = "text"></ion-input>

scss:

ion-input[type=text] {
  color: green;
}
3 
ion-input[type=text] {
  color: green;
}

this changes the text-color, but how to change the underline color?

Without focus it’s green and with focus blue.