Here I have a multi-select list which looks like below.
But I am unable to change the CSS. this is the code so far I have tried, I am able to get outline colors, inside ticks am unable to see it.
input[type=checkbox], input[type=radio] {
margin: 4px 0 0;
margin-top: 1px\9;
height: 16px;
border-radius: 2px;
line-height: normal;
box-shadow: none;
outline-offset: -1px;
-webkit-appearance: none;
width: 16px !important;
margin: 5px;
appearance:none;
outline: 2px solid #455eab;
font-size: 2em;
}
.form-check-input{
width: 35px;
}
input[type="checkbox"]:checked ~ label::before {
color: #455eab;
}
<input class="form-check-input"[checked]=true type="checkbox">
<input class="form-check-input" type="checkbox" >
<input class="form-check-input" type="checkbox" >
<input class="form-check-input" type="checkbox" >