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Constructors

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Color3.new(r, g, b, a)

r, g and b must be integers! a is an optional. An example: 
local color3 = Color3.new(222, 422, 622)

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Properties

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r

The property r component of the Color3

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g

The property g component of the Color3

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b

The property b component of the Color3

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a

The property a component of the Color3

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Methods

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FromHex(HexValue)

HexValue must be a string! An example: 
local myColor3FromHex = Color3.FromHex("#FFFFFF")

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Random()

The Random function takes no parameters and returns a random color. An example: 
while true do 
    wait(1)
    Map.Cube.color = Color3.Random()
    wait(1)
    Map.Cube.color = Color3.Random()
end
In this example the color of cube changes twice every 2 seconds.