How come my GUI button wont change its text-color when clicked?

So I have a button that when clicked will change its color but for some reason, it won't change how come why?

--|Script|--

script.Parent.MouseButton1Click:Connect(function()
	script.Parent.Parent.Romans.TextColor3 = "255, 255, 255"
	script.Parent.TextColor3 = "12, 53, 0"
end)

--|locations|--

The script is located in a text button called Carthaginians and Romans is a text button located in a screen GUI along with the Carthaginians button.

P.S.

Sorry for the rushed question if you don't understand just tell me what you don't understand and I'll edit it, and or tell you.

TextColor3 takes in a Color3 and not a string what you want to set it to is actually

Color3.fromRGB(255, 255, 255)
-- like this
script.Parent.Parent.Romans.TextColor3 = Color3.fromRGB(255, 255, 255)

Roblox Wiki:

Color3

TextColor3

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