Oil. An oil is any neutral, nonpolar chemical substance, that is a viscous liquid at ambient temperatures, and is immiscible with water but soluble in alcohols or ethers. Oils have a high carbon and hydrogen content and are usually flammable and slippery.
That meaning, however, has evolved over time. The symbolism of the colors of the flag, as decided in 1821, were green to represent independence from Spain, white for the purity of the Catholic faith, and red for the union between Europe and the Americas.
White is the color of purity, Blue stand for the patriotism and loyalty of the Texan people, While Red represents the bravery of the people who had lost their blood for the state. The colors employed for the flag of Texas are immensely symbolic and also express the allegiance of the state to the nation.