Example 1: change plot line color in matplotlib plot ( x , y , color = 'green' , linestyle = 'dashed' , marker = 'o' , markerfacecolor = 'blue' , markersize = 12 ) . Example 2: change graph colors python matplotlib plt . plot ( [ values ] , color = 'color' ) Example 3: matplotlib color Alias Color 'b' blue 'g' green 'r' red 'c' cyan 'm' magenta 'y' yellow 'k' black 'w' white