Why Cannot Change Checkbox Color Whatever I Do

Why cannot change checkbox color whatever I do?

Checkboxes are not able to be styled. You would need a third party js plugin there are many available.

If you want to do this yourself it basically involves hiding the checkbox creating an element and styling that as you want then binding its click event to two functions one to change its look and another to activate the click event of the checkbox.

The same problem will arise when trying to style that little down arrow on a drop-down select element.

How to style a checkbox using CSS

UPDATE:

The below answer references the state of things before widespread availability of CSS 3. In modern browsers (including Internet Explorer 9 and later) it is more straightforward to create checkbox replacements with your preferred styling, without using JavaScript.

Here are some useful links:

• Creating Custom Form Checkboxes with Just CSS
• Easy CSS Checkbox Generator
• Stuff You Can Do With The Checkbox Hack
• Implementing Custom Checkboxes and Radio Buttons with CSS3
• How to Style a Checkbox With CSS

It is worth noting that the fundamental issue has not changed. You still can't apply styles (borders, etc.) directly to the checkbox element and have those styles affect the display of the HTML checkbox. What has changed, however, is that it's now possible to hide the actual checkbox and replace it with a styled element of your own, using nothing but CSS. In particular, because CSS now has a widely supported :checked selector, you can make your replacement correctly reflect the checked status of the box.

OLDER ANSWER

Here's a useful article about styling checkboxes. Basically, that writer found that it varies tremendously from browser to browser, and that many browsers always display the default checkbox no matter how you style it. So there really isn't an easy way.

It's not hard to imagine a workaround where you would use JavaScript to overlay an image on the checkbox and have clicks on that image cause the real checkbox to be checked. Users without JavaScript would see the default checkbox.

Edited to add: here's a nice script that does this for you; it hides the real checkbox element, replaces it with a styled span, and redirects the click events.

How to change checkbox background color in simple HTML

You can't style the browser's default checkbox, so we have to hide it and create a custom checkbox like so:

.container {
  display: block;
  position: relative;
  padding-left: 35px;
  margin-bottom: 12px;
  cursor: pointer;
  font-size: 22px;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* Hide the browser's default checkbox */
.container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

/* Create a custom checkbox */
.checkmark {
  position: absolute;
  top: 0;
  left: 0;
  height: 20px;
  width: 20px;
  background-color: #fff;
  border: 2px black solid;
}

/* On mouse-over, add a grey background color */
.container:hover input ~ .checkmark {
  background-color: #ccc;
}

/* When the checkbox is checked, add a blue background */
.container input:checked ~ .checkmark {
  background-color: #002B4E;
}

/* Create the checkmark/indicator (hidden when not checked) */
.checkmark:after {
  content: "";
  position: absolute;
  display: none;
}

/* Show the checkmark when checked */
.container input:checked ~ .checkmark:after {
  display: block;
}

/* Style the checkmark/indicator */
.container .checkmark:after {
  left: 6px;
  top: 3px;
  width: 5px;
  height: 8px;
  border: solid white;
  border-width: 0 2px 2px 0;
  -webkit-transform: rotate(35deg);
  -ms-transform: rotate(35deg);
  transform: rotate(35deg);
}

<label class="container">
  <input type="checkbox" checked="checked">
  <span class="checkmark"></span>
</label>

input {
    &:checked:disabled{
      background-color:red;
    }
}

.container {    display: block;    position: relative;    padding-left: 35px;    margin-bottom: 12px;    cursor: pointer;    font-size: 22px;    -webkit-user-select: none;    -moz-user-select: none;    -ms-user-select: none;    user-select: none;}

.container input {    position: absolute;    opacity: 0;    cursor: pointer;}

.checkmark {    position: absolute;    top: 0;    left: 0;    height: 25px;    width: 25px;    background-color: #eee;}
.container:hover input ~ .checkmark {    background-color: green;}

.container input:checked ~ .checkmark {    background-color: green;}
.checkmark:after {    content: "";    position: absolute;    display: none;}
.container input:checked ~ .checkmark:after {    display: block;}

.container .checkmark:after {    left: 9px;    top: 5px;    width: 5px;    height: 10px;    border: solid white;    border-width: 0 3px 3px 0;    -webkit-transform: rotate(45deg);    -ms-transform: rotate(45deg);    transform: rotate(45deg);}

<!DOCTYPE html><html><head>  <meta charset="utf-8">  <meta name="viewport" content="width=device-width">  <title>Checkbox Test</title></head><body><label class="container">Dias One  <input type="checkbox" checked="checked">  <span class="checkmark"></span></label><label class="container">Dias Two  <input type="checkbox">  <span class="checkmark"></span></label><label class="container">Dias Three  <input type="checkbox">  <span class="checkmark"></span></label></body></html>