SpriteBatch:getColor
Gets the color that will be used for the next add and set operations.

If no color has been set with SpriteBatch:setColor or the current SpriteBatch color has been cleared, this method will return nil.

In versions prior to 11.0, color component values were within the range of 0 to 255 instead of 0 to 1.
r, g, b, a = SpriteBatch:getColor()
r number The red component (0-1).
g number The green component (0-1).
b number The blue component (0-1).
a number The alpha component (0-1).