var elements = new CuiElementContainer();
                    // msg = (useMessage) ? MessageNpc + "\n \n" + lang.GetMessage("money", this, player.UserIDString) + lang.GetMessage("money", this) : "";
                    if (msg == "")
                        //Sets the msg to unknown as we could not find a correct variable to match it with.
                        msg = lang.GetMessage("moneymsg", this, player.UserIDString) + lang.GetMessage("moneycolor", this, player.UserIDString) + yourmoney + lang.GetMessage("moneycolorend", this, player.UserIDString);
                    {
    var mainName = elements.Add(new CuiPanel
    {
        Image =
                {
                    Color = "0.1 0.1 0.1 1"
                },
        RectTransform =
                {
                    AnchorMin = "0.3 0.2",
                    AnchorMax = "0.7 0.9"
                },
        CursorEnabled = true
    }, "Overlay", "ATM");
    if (backroundimage == true)
    {
        elements.Add(new CuiElement
        {
            Parent = "ATM",
            Components =
                    {
                        new CuiRawImageComponent
                        {
                            Url = backroundimageurl,
                            Sprite = "assets/content/textures/generic/fulltransparent.tga"
                        },
                        new CuiRectTransformComponent
                        {
                    AnchorMin = "0 0",
                    AnchorMax = "1 1"
                        }
                    }
        });
    }

    var TestNameInput = new CuiElement
    {
        Name = "TestNameInput",
        Parent = "ATM",
        Components =
    {
        new CuiInputFieldComponent
        {
            Text = "123456",
            CharsLimit = 5,
           Color = "0 255 0 1",
            IsPassword = false,
            Command = "example.exampleinputtextcb",
            Font = "robotocondensed-regular.ttf",
            FontSize = 10,
            Align = TextAnchor.MiddleLeft
        },

        new CuiRectTransformComponent
        {
                     AnchorMin = "0.8 0.2",
                    AnchorMax = "0.9 0.2"
        }
    }
    };


    var Disagree = new CuiButton
    {


        Button =
                {

                    Close = mainName,
                    Color = "255 0 0 1"

                },
        RectTransform =
                {
                    AnchorMin = "0.5 0.2",
                    AnchorMax = "0.5 0.2",
                      OffsetMin = "-30 -20",
                      OffsetMax = "30 20"
                },
        Text =
                {
                    Text = "Cancel",
                    FontSize = 22,
                    Align = TextAnchor.MiddleCenter
                }
    };
    elements.Add(new CuiLabel
    {
        Text =
                {
                    Text = msg,
                    FontSize = 20,
                    Align = TextAnchor.MiddleCenter
                },
        RectTransform =
                {
                    AnchorMin = "0 0.75",
                    AnchorMax = "1 0.9"
                }
    }, mainName);

    elements.Add(TestNameInput);
    elements.Add(Disagree, mainName);
    CuiHelper.AddUi(player, elements);

}
}
}
​

Color = "0 255 0 1"​

color is RGBA float, so ranged in 0-1 for each channel.