According Vexillology Matters, the yellow color on the Jamaican flag stands for sunshine and natural resources; the green color symbolizes the land and hope for the future; and the black color symbolizes the burdens borne by the people. Much symbolism is associated with these colors, based on heraldic traditions.
Vexillology Matters explains that the Jamaican flag has a tri-colored background that includes yellow, green and black. A diagonal yellow cross divides the flag into four triangles, with green triangles on the top and bottom and black triangles on the sides. Vexillology Matters states that the Jamaican flag’s design and description uses terminology that is based on heraldic principles.
According to the World Flags 101, the Jamaican flag is represented by the motto: "Hardships there are but the land is green, and the sun shineth." The green triangles symbolize hope and agriculture, while the black triangles symbolize the adversity that the country has successfully overcome and for the hardships it will encounter in the future. The golden diagonal cross represents Jamaica’s mineral wealth.
World Flags 101 states that the Jamaican National Flag was first adopted on August 6, 1962, after the country gained independence from the Federation of the West Indies.