The safest bet on roulette is the one that covers the most numbers without covering them all. Many players believe that 50/50 bets like odds/even, red/black or high/low are the safest, but there are even better options.
Making two bets on different columns is an even safer option. This covers 2/3 of the numbers and pays out 3:2 if you win. The payout is smaller here than with those 50/50 bets, which actually have 48.6% odds, but this increases the odds to 64.8%.