Once the system has finished booting, dbootstrap is invoked. The first thing that dbootstrap asks about is your display. You should see the ``Select Color or Monochrome display'' dialog box. If your monitor is capable of displaying color, press Enter. The display should change from black-and-white to color. Then press Enter again, on the ``Next'' item, to continue with the installation.
If your monitor can display only black and white, use the arrow keys to move the cursor to the ``Next'' menu item, and then press Enter to continue with the installation.