Color de garrapata del eje PLT
ax.tick_params(axis='x', colors='red')
Tired Turtler
ax.tick_params(axis='x', colors='red')
ax.spines['bottom'].set_color('#dddddd')
ax.spines['top'].set_color('#dddddd')
ax.spines['right'].set_color('red')
ax.spines['left'].set_color('red')