# Color management

Lock Sys Colors | LOCKSYSCOLORS | Suppresses the SetSysColors API that changes the colors of system elements, such as window borders and panel backgrounds. Some fullscreen games change these colors when they start and revert them when they exit, which is unnoticeable when these games run in fullscreen mode but very noticeable when they are run in a window. The only known game that needs this option is Western Front.
Lock reserved palette entries | LOCKRESERVEDPALETTE | This option simulates a lock on the system palette entries (usually 20 colors, corresponding to 0-9 and 246-255 in the 8-bit, 256-color palette entries), preventing DirectDraw calls from updating these values.
Disable setting gamma ramp | DISABLEGAMMARAMP | Prevents the API from altering the default gamma ramp, making the screen lighter or darker. Since the API affects the whole screen, this flag is mainly useful to prevent a game's gamma settings from affecting your entire desktop.