Text color of disabled control - how to change it

During the creation of my awesome Matching Game ;) I found a problem that is completely out of reach.

When the player chooses two labels with symbols on them I want to lock all the other labels for 4 seconds.

But when I do that, the forecolor of all the labels changes to grey and the symbols are visible. My question is - is there a method to change the ForeColor of a disabled label in visual c#?

The project is a WinForm application.

At the moment I set the color of a label in code this way:

label1.ForeColor = lable1.BackColor;

When the user clicks the label I change it to:

lable1.ForeColor = Color.Black;