Change button:active in css

Question

how i can change button to have border-radius: 6px; and to by active marked when i will select it. Here is my HTML code and i also have CSS. When i make

Answer 1

In CSS, colons have a special meaning: they introduce pseudo-classes.

Therefore, if you want to select the following HTML by its class...

...you must escape the colon:

.button\:active

.button\:active {
  background-color: #2B2B2B;
  border: 0px;
  display: inline-block;
  padding: 3px 10px 4px;
  color: #fff;
  text-decoration: none;
  -moz-border-radius: 6px;
  -webkit-border-radius: 6px;
  border-radius: 6px;
  -moz-box-shadow: 0 1px 3px rgba(0,0,0,0.6);
  -webkit-box-shadow: 0 1px 3px rgba(0,0,0,0.6);
  text-shadow: 0 -1px 1px rgba(0,0,0,0.25);
  border-bottom: 1px solid rgba(0,0,0,0.25);
  position: relative;
  cursor: pointer;
  margin: 4px 2px;
}

Button