[Setup]: BackColor, BackColor2

Valid values:

A value in the form of $bbggrr, where rr, gg, and bb specify the two-digit intensities (in hexadecimal) for red, green, and blue respectively. Or it may be one of the following predefined color names: clBlack, clMaroon, clGreen, clOlive, clNavy, clPurple, clTeal, clGray, clSilver, clRed, clLime, clYellow, clBlue, clFuchsia, clAqua, clWhite.

Default value:

clBlue for BackColor,
clBlack for BackColor2
Description:

The BackColor directive specifies the color to use at the top (or left, if BackColorDirection=lefttoright) of the setup window's gradient background. BackColor2 specifies the color to use at the bottom (or right).

The setting of BackColor2 is ignored if BackSolid=yes.

Examples:
BackColor=clBlue
BackColor2=clBlack

BackColor=$FF0000
BackColor2=$000000