[Main]
;Change to 1 if you want to use command line args to tell sfall to use another ini file.
UseCommandLine=0


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[Speed]
;Set to 0 to disable everything in this section
Enable=1

;The speeds corrisponding to each slot in percent. (i.e. 100 is normal speed)
SpeedMulti0=50
SpeedMulti1=100
SpeedMulti2=150
SpeedMulti3=200
SpeedMulti4=300
SpeedMulti5=500
SpeedMulti6=1000
SpeedMulti7=100
SpeedMulti8=100
SpeedMulti9=100

;The initial speed at game startup
SpeedMultiInitial=100


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[Graphics]
;Set to 0 for 8 bit fullscreen
;Set to 1 for 8 bit windowed
;Set to 4 for dx9 fullscreen
;Set to 5 for dx9 windowed
;Mode 1 requires your desktop colour depth to be set to 32 bit
;Windowed modes incur a performance hit. (Modes 1 and 5 more so than mode 3)
;The 16 bit colour modes cause movies to display incorrect colours, and slows down fades
;dx9 modes cause some corruption of movies, but not as bad as 16 bit colour modes
;dx9 modes work with fallout 1, but results in movies being completely corrupted
Mode=4

;Refresh the screen every x frames. Set to 0 to disable frameskipping.
;If you don't want frameskipping on initially, but may want to enable it later, set this to 1
;This has no effect in fullscreen mode or in dx9 modes
FrameSkip=0

;If using a dx9 mode, this changes the resolution
;The graphics are simply stretched to fit the new window; this does _not_ let you see more of the map
;If you want to use an upscaling filter other than the hardcoded once listed below, place a dx9 effect file called 'global.fx' in data\shaders
GraphicsWidth=1920
GraphicsHeight=1080

;If using a dx9 mode, this changes the settings of the global shader
;Set to 0 to disable, 1 to use only if screen res > 640x480, 2 to use if screen res != 640x480 or 3 to use always
GlobalShaderMode=1

;Set to something other than 0 to apply a software scaler in graphics modes 4 or 5
;0 - without scale filters
;1 - 2xSai
;2 - SuperEagle
;3 - Super2xSai
;4 - hq2x
;5 - AdvancedMame2x
ScaleFilter=1

;Set to 1 for a linear texture filter, or 0 to disable
TextureFilter=0

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[Input]
;Set to 0 to disable everything in this section
;This will also disable any input related script extender functions and the keyboard commands used to control other sections!
Enable=1

;Set to 1 to enable the mouse scroll wheel to scroll through your inventory
UseScrollWheel=1

;The mouse Z position is dividied by this modifier to calculate the number of inventory
;slots to scroll. My mouse moves 120 pixel in the z direction for one click of the mouse
;wheel, but this may vary depending on your mouse manufacturer and windows settings.
;Set to 0 to only ever scroll 1 click
ScrollMod=0

;Adjusts mouse sensitivity to some percentage of normal.
;Negative values are valid, if you want your mouse axis reversed for some reason
MouseSensitivity=80

;DX scancode of a key to press when the middle mouse button is clicked
;The default of 0x30 toggles between your two weapons
;Set to 0 to disable
MiddleMouse=0x30

;Set these to 1 if you want fallout to access the keyboard or mouse in background mode
BackgroundKeyboard=0
BackgroundMouse=0

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;The modifier key you have to hold down to change any speed settings
;If set to 0 if you don't want to use a modifier key, or a DX scancode otherwise
;Set to -1 for either ctrl key, -2 for either alt key or -3 for either shift key
SpeedModKey=-1

;A key to press to toggle the speed tweak on or off
;Specify 0 if you don't want a toggle key, or a DX scancode otherwise
SpeedToggleKey=0x00

;The keys corrisponding to the 10 speed slots
;Set to 0 to disable a slot, otherwise specify the DX scancode of the key you want to use
SpeedKey0=0x52
SpeedKey1=0x4f
SpeedKey2=0x50
SpeedKey3=0x51
SpeedKey4=0x4b
SpeedKey5=0x4c
SpeedKey6=0x4

[Main]
;Change to 1 if you want to use command line args to tell sfall to use another ini file.
UseCommandLine=0

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[Sound]
;Set to 1 to enable eax.
;Not supported in the windows 9x version
;Requires supporting scripts to set appropriate eax effects for each map.
EAX=0

;Set to a value between 0 and 25 to choose the default eax environment
;This is the environment used in a new game until a script changes it
DefaultEnvironment=1

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[Speed]
;Set to 0 to disable everything in this section
Enable=0

;The speeds corrisponding to each slot in percent. (i.e. 100 is normal speed)
SpeedMulti0=50
SpeedMulti1=100
SpeedMulti2=150
SpeedMulti3=200
SpeedMulti4=300
SpeedMulti5=500
SpeedMulti6=1000
SpeedMulti7=100
SpeedMulti8=100
SpeedMulti9=100

;The initial speed at game startup
SpeedMultiInitial=100


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[Graphics]
;Set to 0 for 8 bit fullscreen
;Set to 4 for dx9 fullscreen
;Set to 5 for dx9 windowed
;dx9 modes cause some corruption of movies
;A dx9 mode is required for any graphics related script extender functions to work (i.e. fullscreen shaders)
;Modes 1, 2 and 3 are no longer supported
Mode=4

;If using a dx9 mode, this changes the resolution
;The graphics are simply stretched to fit the new window; this does _not_ let you see more of the map
GraphicsWidth=1280
GraphicsHeight=800

;This changes the settings of the hardware scaler in graphics modes 4 or 5
;Set to 0 to disable, 1 to use only if screen res > 640x480, 2 to use if screen res != 640x480 or 3 to use always
;To use a hardware scaler a file called 'global.fx' must be placed in data\shaders, and must contain one technique with one or more passes
GlobalShaderMode=0

;Set to something other than 0 to apply a software scaler in graphics modes 4 or 5
;This can be used instead of, or in addition to, the hardware global.fx shader
;This option is unsupported when using Mash's resolution patch
;0 - Default scaler
;1 - 2xSai
;2 - SuperEagle
;3 - Super2xSai
;4 - hq2x
;5 - AdvancedMame2x
;6 - letterbox
;7 - no scaling
ScaleFilter=0

;Set to 1 for a linear texture filter, or 0 to disable
TextureFilter=0

;Set to 1 to override the console, allowing extra text at high resolutions (BETA!)
;Requires DX9 mode
OverrideConsole=0

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[Input]
;Set to 0 to disable everything in this section
;This will also disable any input related script extender functions and the keyboard commands used to control other sections!
Enable=1

;Set to 1 to enable the mouse scroll wheel to scroll through your inventory
UseScrollWheel=1

;The mouse Z position is dividied by this modifier to calculate the number of inventory
;slots to scroll. My mouse moves 120 pixel in the z direction for one click of the mouse
;wheel, but this may vary depending on your mouse manufacturer and windows settings.
;Set to 0 to only ever scroll 1 click
ScrollMod=0

;Adjusts mouse sensitivity to some percentage of normal.
;Negative values are valid, if you want your mouse axis reversed for some reason
MouseSensitivity=100

;DX scancode of a key to press when the middle mouse button is clicked
;The default of 0x30 toggles between your two weapons
;Set to 0 to disable
MiddleMouse=0x30

;Set these to 1 if you want fallout to access the keyboard or mouse in background mode
BackgroundKeyboard=0
BackgroundMouse=0

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;The modifier key you have to hold down to change any speed settings
;If set to 0 if you don't want to use a modifier key, or a DX scancode otherwise
;Set to -1 for either ctrl key, -2 for either alt key or -3 for either shift key
SpeedModKey=-1

;A key to press to toggle the speed tweak on or off
;Specify 0 if you don't want a toggle key, or a DX scancode otherwise
SpeedToggleKey=0x00

;The keys corrisponding to the 10 speed slots
;Set to 0 to disable a slot, otherwise specify the DX scancode of the key you want to use
SpeedKey0=0x52
SpeedKey1=0x4f
SpeedKey2=0x50
SpeedKey3=0x51
SpeedKey4=0x4b
SpeedKey5=0x4c
SpeedKey6=0x4d
SpeedKey7=0x00
SpeedKey8=0x00
SpeedKey9=0x00

;The modifier key you have to hold down to change any graphics settings
;Set to 0 if you don't want to use a modifier key, or a DX scancode otherwise
;Set to -1 for either ctrl key, -2 for either alt key or -3 for either shift key
GraphicsModKey=-2

;Toggle the global shader on or off
ToggleGlobalShader=0x52

;Changes the current scaleing and texture filters
CycleScaleFilter=0
ToggleScaleFilter=0
ToggleTextureFilter=0

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[Misc]
;Everything in this section only applies to fallout 2!

;Time limit in years. Must be between -3 and 13
;Set to 0 if you want to die the instant you leave arroyo
;Set to -1 to remove the time limit, and automatically reset the date back to 2241 each time you would have reached it
;Set to -2 to remove the time limit without reseting the date. The game will lock up on 8th of March 2255
;Set to -3 to remove the time limit, automatically reset the date, but override fallouts GetDate function to return the correct year
TimeLimit=13

;Set to 1 to enable additional scripting functions
ScriptExtender=1

;Set to 1 to apply the perception fix to the sharpshooter perk
SharpshooterFix=1

;Set to 1 to fix the pathfinder perk (25% travel time reduction with 1 level, 50% reduction with 2)
PathfinderFix=1

;World map travel time percentage modifier
;Modifies how fast in game time passes while you're moving around the map screen without affecting encounter rate
;The pathfinder fix needs to be turned on for this to work
;100 is normal speed, 0 stops time from passing
WorldMapTimeMod=100

;This will change the physical speed at which you move across the map
;Changing this value to something > 30 (default of this mod) will make things speed up.
;Changing this value to something < 30 (default of this mod) will make things slow down.
WorldMapFPS=30

;Only set to 1 if your systems high performance timer is unreliable for some reason
ForceLowResolutionTimer=0

;Set to 1 to enable Ray's patch to make world map encounter rate independent of your travel speed
;To make the encounter rate decrease, change WorldMapEncounterRate to a number > 30 (default of the mod)
;To make the encounter rate increase, change WorldMapEncounterRate to a number < 30 (default of the mod)
WorldMapEncounterFix=1
WorldMapEncounterRate=30

;Obsolete, but can still be used if you know what it does.
;WorldMapDelay=0

;The number of slots available in the locations list panel of the world map
;Set to 0 to leave unchanged. 17 is default.
;Setting this greater than 17 requires a replacement background frm, or you'll get glitched graphics
WorldMapSlots=0

;Setting this to 1 fixes the bug that can cause the locations list to become unresponsive
WorldMapCitiesListFix=1

;To start a new game somewhere other than artemple.map, uncomment the next line and set it to the map you want to load
;StartingMap=

;To change the 'FALLOUT II v1.02d' version string on the main menu, uncomment the next line
;You can use up to 2 %d's in this, if you want to include fallouts version number somewhere
VersionString=FALLOUT II 1.02.25

;To use a config file other than fallout.cfg, uncomment the next line and add the name of your new file
;ConfigFile=

;To use a patch file other than patch000.dat, uncomment the next line and add your new file name
;If you want to use multiple patch files, you can include a %d in the file name
;The original file is patch%03d.dat
;PatchFile=

;To change the default and starting player models, uncomment the next four lines.
;The default models can also be changed ingame via script
;MaleStartModel=hmwarr
;MaleDefaultModel=hmjmps
;FemaleStartModel=hfprim
;FemaleDefaultModel=hfjmps

;To change the various ingame movies, modify the next 17 lines
;Most of these can also be changed ingame via script.
Movie1=iplogo.mve
Movie2=intro.mve
Movie3=elder.mve
Movie4=vsuit.mve
Movie5=afailed.mve
Movie6=adestroy.mve
Movie7=car.mve
Movie8=cartucci.mve
Movie9=timeout.mve
Movie10=tanker.mve
Movie11=enclave.mve
Movie12=derrick.mve
Movie13=artimer1.mve
Movie14=artimer2.mve
Movie15=artimer3.mve
Movie16=artimer4.mve
Movie17=credits.mve

;To change the starting year, month or day, uncomment the next 3 lines
;StartYear=-1
;StartMonth=-1
;StartDay=-1

;To change the limit of the distance away from the player to which you're allowed to scroll the local maps, uncomment the next two lines
;Defaults are 0x1E0 in the x direction and 0x190 in the y direction.
;LocalMapXLimit=480
;LocalMapYLimit=400

;To add additional perks to the game, uncomment the next line and set it to point to a file containing perk information
;PerksFile=Perks.ini

;Set to 1 if you want the pipboy to be available at the start of the game
PipBoyAvailableAtGameStart=0

;Set to 1 to double the number of available kill types
;If you use this, you need to provide the extra descriptions in proto.msg (entries from 1450 to 1487 are names and 1488 to 1525 are descriptions)
;Changing this option mid game will not invalidate old save games, but the players kill counters will be completely screwed.
;Setting this to 1 may cause problems if the player kills more than 32767 of any one critter type
ExtraKillTypes=0

;Choose the damage formula used to calculate combat damage
;0 - Fallout default
;1 - Glovz's AP ammo mod
;2 - Glovz's tweaked version of the original formula
DamageFormula=0

;Prevents you from using 0 to escape from dialogue at any time.
DialogueFix=1

;Set to 1 to disable the horrigan encounter
DisableHorrigan=0

;Set to 1 to disable the random element in npc levelling.
;This will cause all npc party members to automatically level up as soon as the player reaches the requirements
NPCAutoLevel=0

;Change the initial starting location and world map viewport
;Leave at -1 for default
StartXPos=-1
StartYPos=-1
ViewXPos=-1
ViewYPos=-1

;Set to 1 to remove the limit on the number of cities
CitiesLimitFix=1

;Set to 1 to fix the issue with you bonus move being reset if you save in combat
BonusMoveFix=1

;Set to 1 for force fallout not to use multiple processor cores even if they are available
SingleCore=1

;Set to 1 to override the art_chache_size setting in fallout2.cfg
OverrideArtCacheSize=1

;Set to 1 to fix issues with the GainXXX perks not giving all the bonuses that they should
GainStatPerkFix=1

;Set to 1 to fix the issue with the skilldex button dissapearing when you have many active quests and holodisks.
BlackSkilldexFix=1

I saw this solution online and it works for me without needing to modify anything.
1. Right click your desktop and click personalize
2. Click desktop background
3. In the "Picture location"? dropdown, select Solid Colors and select whatever colour you would like to keep as your background.
4. Close every window opened
5. Right click your desktop and then keep "screen resolution" opened
6. Launched your game
I have no idea why it works but it works.

Are you using Windows 7?

If you are this should work to fix Fallout 2, it's a post that I saw on gog.com:



I can confirm that it works every time.

Original post is here:

http://www.gog.com/en/forum/fallout_series/fallout_2_colors_problem/post63