Use the labels OnMouseMove event to cng color.
form's Section(formheader or detail, etc) mousemove event to reinstate the color.
I tried that, the colour flickers/flashes when the mouse moved around.
The code below does the same, but without the flickering/flashing:
MouseMove on label
If Not Me.lblLabel1.ForeColor = RGB(68, 84, 106) Then Me.lblLabel1.ForeColor = RGB(68, 84, 106)
MouseMove on form
If Not Me.lblLabel1.ForeColor = RGB(127, 127, 127) Then Me.lblLabel1.ForeColor = RGB(127, 127, 127)