- var_dump: documentation ( source)
- array_combine: documentation ( source)
- array_keys: documentation ( source)
<?php
$array = [
"primary" => "#6ca6d9",
"success" => "#479d63",
"info" => "#5bc0de",
"warning" => "#F39124",
"danger" => "#d9695f",
"purple" => "#fd44c7",
"light-blue" => "#00b3ec",
"blue" => "#026d8f",
"green" => "#9ac333",
"red" => "#fe2c78",
];
$a = array_keys($array);
var_dump(array_combine($a, $a));