Color3.fromRGB() becoming black?

I'm attempting to create a Name script with a /color {arg} feature. But when using a dictionary of colors, it becomes black.

SAMPLE:

local Colors = {
    ["red"] = "255, 0, 0",
    ["orange"] = "255, 170, 0",
    ["yellow"] = "255, 255, 0",
    ["green"] = "0, 255, 0",
    ["blue"] = "0, 0, 255",
    ["lavender"] = "170, 0, 255",
    ["white"] = "255, 255, 255",
    ["black"] = "0, 0, 0",
    ["gold"] = "255,223,0"
}

local function color(player, arg)
    for i, v in pairs(Colors) do
        if arg == i then
            print(i, v)
            player.Character.Head.RPName.Text.TextColor3 = Color3.fromRGB(tonumber(v))
        end
    end
end