Change the background color of font-awesome circle icon

Question

I'm using 2 icons from font-awesome, A + in front and a circle in the back.

Here is a fiddle

I'm trying to change the background color of the circle, But it's not working.

Here is the code:

.fa-plus{
    background-color: red;
    border-radius: 50%;
}

.wrapper{
  position: relative;
  width: 20%;
  height: 20%;
  margin: auto;
  border-radius: 50%;
  cursor: pointer;
  border: 1px solid #000;
}

.image{
  max-width: 100%;
  border-radius: 50%
}

.wrapper span{
  position: absolute;
  bottom: 0;
  right: 15%;
  width: 15%;
  height: 15%;
  z-index: 2;
}

#input{
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: -1;
  cursor: pointer;
  opacity: 0;
}

<!-- Font Awesome -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

<div class="wrapper">
  <input type="file" id="input" name="image" accept="image/*">
  <img class="image" src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTRT2XK4W0i7icS84Yq5VHpwZ9anmDXoOFQZX0anUhWxcpL5du_">
  <span class="fa-stack" aria-hidden="true">
    <i class="fa fa-circle fa-stack-2x"></i>
    <i class="fa fa-plus fa-stack-1x fa-inverse"></i>
  </span>
</div>

I'm using the circle to give the + icon a circular background color, I tried to add the + icon only and give it padding, But didn't work too:

.fa-plus{
    background-color: red;
    border-radius: 50%;
}

.wrapper{
  position: relative;
  width: 20%;
  height: 20%;
  margin: auto;
  border-radius: 50%;
  cursor: pointer;
  border: 1px solid #000;
}

.image{
  max-width: 100%;
  border-radius: 50%
}

.wrapper span{
  position: absolute;
  bottom: 0;
  right: 15%;
  width: 15%;
  height: 15%;
  z-index: 2;
  padding: 10%;
}

#input{
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: -1;
  cursor: pointer;
  opacity: 0;
}

<!-- Font Awesome -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

<div class="wrapper">
  <input type="file" id="input" name="image" accept="image/*">
  <img class="image" src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTRT2XK4W0i7icS84Yq5VHpwZ9anmDXoOFQZX0anUhWxcpL5du_">
  <span class="fa-stack" aria-hidden="true">
    <i class="fa fa-plus fa-stack-1x fa-inverse"></i>
  </span>
</div>

How to solve this issue?

Answer 1

Replace your .wrapper span CSS properties to below:

.wrapper span {

    position: absolute;
    bottom: 0;
    right: 15%;
    width: 20px;
    height: 20px;
    z-index: 2;
    padding: 0;
    line-height: 20px;
}

Answer 2

Try this HTML and CSS. I removed the entire black circle and replaced it with the CSS clip-path property as a background for the plus-sign (It works very well for big-to-medium screens, but sadly it doesn't for small-to-extra-small screens, so you have to set a min-width property for the .wrapper span, I guess):

.wrapper{
  position: relative;
  width: 20%;
  height: 20%;
  margin: auto;
  border-radius: 50%;
  cursor: pointer;
  border: 1px solid #000;
}

.image{
  max-width: 100%;
  border-radius: 50%
}

.wrapper span{
  position: absolute;
  bottom: 0;
  right: 15%;
  width: 15%;
  height: 15%;
  z-index: 2;
}

#input{
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: -1;
  cursor: pointer;
  opacity: 0;
}
.fa-plus{
  background:black;
  -webkit-clip-path: circle(38% at 50% 50%);
  clip-path: circle(38% at 50% 50%);
}

<!-- Font Awesome -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

<div class="wrapper">
  <input type="file" id="input" name="image" accept="image/*">
  <img class="image" src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTRT2XK4W0i7icS84Yq5VHpwZ9anmDXoOFQZX0anUhWxcpL5du_">
  <span class="fa-stack" aria-hidden="true">
    <i class="fa fa-plus fa-stack-1x fa-inverse"></i>
  </span>
</div>

Answer 3

Add this property in CSS.

i.fa.fa-circle.fa-stack-2x{
color:green;
}

If you want to change the plus background from red to green(I haven't included in the code snippet)

i.fa.fa-plus.fa-stack-1x.fa-inverse {
background: green;
}

.fa-plus{
    background-color: red;
    border-radius: 50%;
}
i.fa.fa-circle.fa-stack-2x{
color:green;
}
.wrapper{
  position: relative;
  width: 20%;
  height: 20%;
  margin: auto;
  border-radius: 50%;
  cursor: pointer;
  border: 1px solid #000;
}

.image{
  max-width: 100%;
  border-radius: 50%
}

.wrapper span{
  position: absolute;
  bottom: 0;
  right: 15%;
  width: 15%;
  height: 15%;
  z-index: 2;
}

#input{
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: -1;
  cursor: pointer;
  opacity: 0;
}

<!-- Font Awesome -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">

<div class="wrapper">
  <input type="file" id="input" name="image" accept="image/*">
  <img class="image" src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTRT2XK4W0i7icS84Yq5VHpwZ9anmDXoOFQZX0anUhWxcpL5du_">
  <span class="fa-stack" aria-hidden="true">
    <i class="fa fa-circle fa-stack-2x"></i>
    <i class="fa fa-plus fa-stack-1x fa-inverse"></i>
  </span>
</div>