Below PHP helper function converts hex color code string into RGB or RGBA color.
Code
/**
* Convert hexadecimal color to rgb or rgba
*
* @param string $color
* @param boolean $getRGBA
* @param float $opacity
* @return string
*/
function hex2rgba(
string $color,
bool $getRGBA = true,
float $opacity = 1
): string {
$output = 'rgb(0,0,0)';
// Return default color if no color is provided
if (!$color) {
return $output;
}
// Sanitize $color if "#" is provided
if ($color[0] == '#') {
$color = substr($color, 1);
}
// Check if color has 6 or 3 characters and get values
if (strlen($color) == 6) {
$hex = [
$color[0] . $color[1],
$color[2] . $color[3],
$color[4] . $color[5],
];
} elseif (strlen($color) == 3) {
$hex = [
$color[0] . $color[0],
$color[1] . $color[1],
$color[2] . $color[2],
];
} else {
return $output;
}
//Convert hexadecimal color to rgb
$rgb = array_map('hexdec', $hex);
//Check for opacity(rgba or rgb)
if ($getRGBA) {
$rgb[] = (abs($opacity) > 1) ? 1 : $opacity;
$output = 'rgba(';
} else {
$output = 'rgb(';
}
$output .= implode(',', $rgb) . ')';
//return rgb(a) color string
return $output;
}