Add this code to your form.

The "weird" value is the hexadecimal representation of the back colour. This code shows the hex and decimal representations.
VB Code:
  1. Option Explicit
  2.  
  3. Private Sub Form_Load()
  4.   MsgBox Hex(Me.BackColor) & " as a decimal is " & Me.BackColor, , "Form Back Colour"
  5. End Sub