NL50SH AK TPTK monochromes Board

NL50SH AK TPTK on monotone Board

Hero (Button) ($84.75)
SB ($86.23)
BB ($100)
UTG ($59.52)
MP ($79.20)
CO ($67.15)

Preflop: Hero is Button with K :club:, A :diamond:
2 folds, CO bets $1.75, Hero raises to $6.50, 2 folds, CO calls $4.75

Flop: ($13.75) 2 :heart:, 10 :heart:, A :heart: (2 players)
CO checks, Hero bets $7, CO raises to $19, Hero ?