on focus border color change code example
Example 1: input focus css default
/* This removes all focus effects */
element:focus {
outline-style: none;
box-shadow: none;
border-color: transparent;
}
Example 2: css focus change color
<style>
.dabutton:focus {
background-color:yellow;
}
</style>
<button class="dabutton"></button> // <-- usage