context: After an unsuccessful republican uprising on January 31, 1891, red and green were chosen as the colors of the Republican Party and the movement associated with it. The political fame of the party grew until it reached the climax that spilled over into the revolution on October 5, 1910. Green is a symbol of hope, travel and discovery of new lands, a reminder of the times of Henry the Navigator (his personal color), red is a symbol of revolution.
question: What does red mean on the flag of Portugal?
answers.text: symbol of revolution