Change Bootstrap tooltip color

Question

You can use this way:

<a href="#" data-toggle="tooltip" data-placement="bottom"
   title="" data-original-title="Tooltip on bottom"
   class="red-tooltip">Tooltip on bottom</a>

And in the CSS:

.tooltip-arrow,
.red-tooltip + .tooltip > .tooltip-inner {background-color: #f00;}

jsFiddle

---

Moeen MH: With the most recent version of bootstrap, you may need to do this in order to get rid of black arrow:

.red-tooltip + .tooltip.top > .tooltip-arrow {background-color: #f00;}

---

Use this for Bootstrap 4:

.bs-tooltip-auto[x-placement^=bottom] .arrow::before,
.bs-tooltip-bottom .arrow::before {
  border-bottom-color: #f00; /* Red */
}

Full Snippet:

$(function() {
  $('[data-toggle="tooltip"]').tooltip()
})

.tooltip-main {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  font-weight: 700;
  background: #f3f3f3;
  border: 1px solid #737373;
  color: #737373;
  margin: 4px 121px 0 5px;
  float: right;
  text-align: left !important;
}

.tooltip-qm {
  float: left;
  margin: -2px 0px 3px 4px;
  font-size: 12px;
}

.tooltip-inner {
  max-width: 236px !important;
  height: 76px;
  font-size: 12px;
  padding: 10px 15px 10px 20px;
  background: #FFFFFF;
  color: rgba(0, 0, 0, .7);
  border: 1px solid #737373;
  text-align: left;
}

.tooltip.show {
  opacity: 1;
}

.bs-tooltip-auto[x-placement^=bottom] .arrow::before,
.bs-tooltip-bottom .arrow::before {
  border-bottom-color: #f00;
  /* Red */
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.bundle.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet" />
<div class="tooltip-main" data-toggle="tooltip" data-placement="top" data-original-title="Hello world"><span class="tooltip-qm">?</span></div>
<style>
  .bs-tooltip-auto[x-placement^=bottom] .arrow::before,
  .bs-tooltip-bottom .arrow::before {
    border-bottom-color: #f00;
    /* Red */
  }
</style>

Bootstrap 2

If you want to change the caret/arrow as well, do the following:

.red-tooltip + .tooltip > .tooltip-inner {background-color: #f00;}
.red-tooltip + .tooltip > .tooltip-arrow {border-bottom-color: #f00;}

or

.red-tooltip + .tooltip > .tooltip-inner, .red-tooltip + .tooltip > .tooltip-arrow {background-color: #f00;}

jsFiddle: http://jsfiddle.net/technotarek/2htZe/

UPDATE: Bootstrap 3

You have to be specific for the direction of the tooltip in Bootstrap 3. For example:

.tooltip.top .tooltip-inner {
    background-color:red;
}
.tooltip.top .tooltip-arrow {
      border-top-color: red;
}

jsFiddle for all tooltip directions using Bootstrap 3: http://jsfiddle.net/technotarek/L2rLE/

The only way working for me:

$(document).ready(function() {
  //initializing tooltip
  $('[data-toggle="tooltip"]').tooltip();
});

.tooltip-inner {
  background-color: #00acd6 !important;
  /*!important is not necessary if you place custom.css at the end of your css calls. For the purpose of this demo, it seems to be required in SO snippet*/
  color: #fff;
}

.tooltip.top .tooltip-arrow {
  border-top-color: #00acd6;
}

.tooltip.right .tooltip-arrow {
  border-right-color: #00acd6;
}

.tooltip.bottom .tooltip-arrow {
  border-bottom-color: #00acd6;
}

.tooltip.left .tooltip-arrow {
  border-left-color: #00acd6;
}

<!--jQuery-->
<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<!--tether-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js"></script>
<!--Bootstrap-->
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js"></script>

<!--Tooltip Example-->
<div style="padding:50px;">
  <span class="fa-stack fa-lg" data-toggle="tooltip" data-placement="right" title="custom colored tooltip">hover over me
</span>
</div>

For bootstrap4 I used code:

$('[data-toggle="tooltip"]').tooltip();

.tooltip-inner {
  background-color: #f00 !important;
  color: #f00 ;
}
.bs-tooltip-top .arrow::before, .bs-tooltip-auto[x-placement^="top"] .arrow::before {
  border-top-color: #f00 !important;
}

.bs-tooltip-right .arrow::before, .bs-tooltip-auto[x-placement^="right"] .arrow::before {
  border-right-color: #f00 !important;
}


.bs-tooltip-bottom .arrow::before, .bs-tooltip-auto[x-placement^="bottom"] .arrow::before {
  border-bottom-color: #f00 !important;
}


.bs-tooltip-left .arrow::before, .bs-tooltip-auto[x-placement^="left"] .arrow::before {
  border-left-color: #f00 !important;
}

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>



<a title="This is an example" data-toggle="tooltip">Hover me</a>

Here is tooltip code in boostrap...

.tooltip {
  position: absolute;
  z-index: 1070;
  display: block;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 12px;
  font-style: normal;
  font-weight: normal;
  line-height: 1.42857143;
  text-align: left;
  text-align: start;
  text-decoration: none;
  text-shadow: none;
  text-transform: none;
  letter-spacing: normal;
  word-break: normal;
  word-spacing: normal;
  word-wrap: normal;
  white-space: normal;
  filter: alpha(opacity=0);
  opacity: 0;

  line-break: auto;
}
.tooltip.in {
  filter: alpha(opacity=90);
  opacity: .9;
}
.tooltip.top {
  padding: 5px 0;
  margin-top: -3px;
}
.tooltip.right {
  padding: 0 5px;
  margin-left: 3px;
}
.tooltip.bottom {
  padding: 5px 0;
  margin-top: 3px;
}
.tooltip.left {
  padding: 0 5px;
  margin-left: -3px;
}
.tooltip-inner {
  max-width: 200px;
  padding: 3px 8px;
  color: #fff;
  text-align: center;
  background-color: #000;
  border-radius: 4px;
}
.tooltip-arrow {
  position: absolute;
  width: 0;
  height: 0;
  border-color: transparent;
  border-style: solid;
}
.tooltip.top .tooltip-arrow {
  bottom: 0;
  left: 50%;
  margin-left: -5px;
  border-width: 5px 5px 0;
  border-top-color: #000;
}
.tooltip.top-left .tooltip-arrow {
  right: 5px;
  bottom: 0;
  margin-bottom: -5px;
  border-width: 5px 5px 0;
  border-top-color: #000;
}
.tooltip.top-right .tooltip-arrow {
  bottom: 0;
  left: 5px;
  margin-bottom: -5px;
  border-width: 5px 5px 0;
  border-top-color: #000;
}
.tooltip.right .tooltip-arrow {
  top: 50%;
  left: 0;
  margin-top: -5px;
  border-width: 5px 5px 5px 0;
  border-right-color: #000;
}
.tooltip.left .tooltip-arrow {
  top: 50%;
  right: 0;
  margin-top: -5px;
  border-width: 5px 0 5px 5px;
  border-left-color: #000;
}
.tooltip.bottom .tooltip-arrow {
  top: 0;
  left: 50%;
  margin-left: -5px;
  border-width: 0 5px 5px;
  border-bottom-color: #000;
}
.tooltip.bottom-left .tooltip-arrow {
  top: 0;
  right: 5px;
  margin-top: -5px;
  border-width: 0 5px 5px;
  border-bottom-color: #000;
}
.tooltip.bottom-right .tooltip-arrow {
  top: 0;
  left: 5px;
  margin-top: -5px;
  border-width: 0 5px 5px;
  border-bottom-color: #000;
}