Answers for "syntax highlighter css"

style highlight css

/* Now supported by all major browsers */

::selection {
  background-color: #000 /* Selection highight color */
  color: #FFF /* Optional colour change of text that is being selected */
}

css highlight element

.highlight {
    box-shadow: 0 0 0 100000px rgba(0, 0, 0, .8);
}