how to remove blue border from input code example

Example 1: html remove border from textarea

textarea {
    border: none;
    background-color: transparent;
    resize: none;
    outline: none;
}

Example 2: how to remove the outer border of an input text in html

input:focus, textarea:focus, select:focus{
        outline: none;
    }

Example 3: delected blue border when an input is selected

//SCSS format

input{
  &:focus { 
    outline: none !important;
    }
}
textarea{
  &:focus { 
    outline: none !important;
    }
}

Example 4: change border highlight color on an input text element

.input:focus {
    outline: none !important;
    border:1px solid red;
    box-shadow: 0 0 10px #719ECE;
}