Windows 3.1x Color Scheme Format:

Scheme=Background,AppWorkspace,Window,WindowText,MenuBar,MenuText,ActiveTitle,InactiveTitle,ActiveTitleText,ActiveBorder,InactiveBorder,WindowFrame,Scrollbars,ButtonFace,ButtonShadow,ButtonText,DisabledText,Highlight,HighlightText,InactiveTitleText,ButtonHilight

Example:
Windows Default (256)=A4A0A0,F0FBFF,FFFFFF,0,FFFFFF,0,F0C8A4,FFFFFF,0,C0C0C0,C0C0C0,0,C0C0C0,C0C0C0,808080,0,C0C0C0,F0C8A4,0,0,FFFFFF


Windows 3.0 Color Scheme Format:

Scheme=Background,AppWorkspace,Window,WindowText,MenuBar,MenuText,ActiveTitle,InactiveTitle,ActiveTitleText,ActiveBorder,InactiveBorder,WindowFrame,Scrollbars

Example: 
Windows Default (256)=A4A0A0,F0FBFF,FFFFFF,0,FFFFFF,0,F0C8A4,FFFFFF,0,C0C0C0,C0C0C0,0,C0C0C0


To use Windows 3.1x color schemes on Windows 3.0 the last 8 hex values must be removed or else it will appear as blank.


Windows Chicago (pre bld 81) Color Scheme Format:

Scheme=Background,AppWorkspace,Window,WindowText,MenuBar,MenuText,ActiveTitle,InactiveTitle,ActiveTitleText,ActiveBorder,InactiveBorder,WindowFrame,Scrollbars,ButtonFace,ButtonShadow,ButtonText,DisabledText,Highlight,HighlightText,InactiveTitleText,ButtonHilight,Dialog

Example:
Windows Default (256)=A4A0A0,F0FBFF,FFFFFF,0,FFFFFF,0,F0C8A4,FFFFFF,0,C0C0C0,C0C0C0,0,C0C0C0,C0C0C0,808080,0,C0C0C0,F0C8A4,0,0,FFFFFF,C0C0C0

The last value is ignored by Windows 3.1x.

Windows Default driver defined color scheme:

In Windows 3.0 (in the EGA driver) it is located in between offset 083D0 and 083F0. It defines the unchangable values for the buttons and highlight color.
The beginning of the color scheme section usually starts with 00 01 and the hex value of the scrollbar color.