Laravel Helpers and Blade Components

Hello there.

I have a function in a Service file called getBlendColor, something like this:

function getBlendColor($index): string
    {
        switch ($index) {
            case '4':
                $blendColor = 'bg-pink-200';
                break;
            case '9':
                $blendColor = 'bg-blue-200';
                break;
            case 'total':
                $blendColor = 'bg-yellow-200';
                break;
            default:
                $blendColor = '';
                break;
        }

        return $blendColor;
    }

And i'm calling it inside a blade file like this:

But it is not working. So I put the function on the top of the blade file, and call that function, and it works. I would prefer to have that function separated, but ok. But then i change the switch to match function, to its more elegant, but de colors didn't work properly with the match function, just one color worked.

$blendColor = match ($index) {
    '4' => 'bg-pink-200',
    '9' => 'bg-blue-200',
    'total' => 'bg-yellow-200',
    default => '',
};

So, 2 questions:

1. Can't we use tailwind outside blade, like in a service file and the call then in the blade file?
2. Why the tailwind did not work with the match funciton properly?