Why is part only changing color to red and black?

Hi, i am trying to make a random button which changes color of a part, but the colors only appear black and red. i expected blue and colors i put in.

here is my script:

local mATH1 = {}
mATH1[1]= 255, 0, 0
mATH1[2]= 0, 255, 0
mATH1[3]= 255, 255, 0
mATH1[4]= 0, 0, 255
mATH1[5]= 255, 0, 255
script.Parent.MouseButton1Click:Connect(function()
 		game.Workspace.LightRGB1.Color = Color3.fromRGB(mATH1[math.random(1,5)])
		game.Workspace.LightRGB2.Color =  Color3.fromRGB(mATH1[math.random(1,5)])
		game.Workspace.LightRGB3.Color =Color3.fromRGB(mATH1[math.random(1,5)])
		game.Workspace.LightRGB4.Color =Color3.fromRGB(mATH1[math.random(1,5)])
		game.Workspace.LightRGB5.Color = Color3.fromRGB(mATH1[math.random(1,5)])
		game.Workspace.LightRGB6.Color =Color3.fromRGB(mATH1[math.random(1,5)])
		game.Workspace.LightRGB7.Color = Color3.fromRGB(mATH1[math.random(1,5)])
		game.Workspace.LightRGB8.Color = Color3.fromRGB(mATH1[math.random(1,5)])
end)