Recommend you visit a casino someday. The game you’re thinking of is roulette. Blackjack doesn’t have colors to bet on. Putting it all on black is only theft

Recommend you visit a casino someday. The game you’re thinking of is roulette. Blackjack doesn’t have colors to bet on. Putting it all on black is only theft if you lose. FedEx’s founder famously bet half his employee payroll on black and won. FTX eventually lost.