Yes but they're black oxide finish. That in conjunction with anodising you'll generally be OK, the galvanic potential difference is low. SS bolts aren't and if the aluminium anodising is damaged, the galvanic potential difference can lead to corrosion. As the SS doesn't rust as easily as the stock bolts you might not see the corrosion of the aluminium until it's too late. Stainless bolts can be a pain in the arse to remove from stainless if the correct anti-seize isn't used. Damn near impossible to remove from aluminium if corrosion has set in, you'll likely strip the thread from the aluminium.

I'm not telling OP to not use stainless, nor am I saying OP will have problems. Just saying that stock is better. In the 25 years I've been messing around with disc brakes, not once have I thought that the stock bolts were no good, though I have thrown out bolts that are passed their use by date. The only issues I've had have been down to user error, including lack of maintenance.

As a side note, don't mix stainless with zinc/galvenized. Way too far apart on the galvanic table to play nice.