We have a requirement to configure all checkboxes of an application in black color. We have customized the CSS and saved the sheet to included styles within the Skin. The change can be identified in Chrome and Firefox, however it gets ignored/overriden in IE. The customer has IE as standard browser. How could we force the change?

Until now I have tried the following:

/* custom checkbox style */

input[type="checkbox"] {
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
cursor: pointer;
background-image: url('webwb/checkbox_unchecked.png') !important;
background-size: 26px !important;
background-repeat: no-repeat !important;
background-position: 99% 50% !important;
width: 26px !important;
height: 26px !important;
}

input[type="checkbox"]:checked {
background-image: url('webwb/checkbox_checked.png') !important;
}

input[type="checkbox"]:disabled {
opacity: 0.5;
}

The selected image holds the color we wish.

***Moderator Edit-Vidyaranjan: Updated Platform Capability***

***Edited by Moderator Marissa to update SR Details***