Changing factory dispay settings

Check the speakers connection and that should give you at least 8 of the colors. The ones left then are going to be ground and power and display power. You can figure those out with a meter.

Constant power orange switch power ground Yellow illumination Gray dimmer Brown antenna trigger antenna pink left front + tan -gray right front + light green - dark green left rear + Brown - Yello right rear + Dark blue - Light blue

Your vehicle radio color codes below;

Radio 12v blue + radio harness
Radio Ground (chassis)
Radio Ignition pink + radio harness
Radio Illumination yellow/red + radio harness
Factory Amp Turn-on blue/white or pink + radio harness
Power Antenna N/A
LF Speaker +/- purple - green/yellow +,- radio harness or amp under rear deck
RF Speaker +/- brown - brown/white +,- radio harness or amp under rear deck
LR Speaker +/- orange - black/pink +,- radio harness
Notes: On vehicles with premium audio systems, the LR speaker wires are yellow/green - white/orange.
RR Speaker +/- gray - gray/red +,- radio harness
Notes: On vehicles with premium audio systems, the RR speaker wires are red/black - gray/blue.

Answer
Radio 12v
pink
+
radio harness

Radio Ground black - radio harness
Radio Ignition red + radio harness
Radio Illumination orange (dimmer) + radio harness
Factory Amp Turn-on N/A
Power Antenna N/A
LF Speaker +/- dk. green - brown/red +,- radio harness
RF Speaker +/- purple - dk. blue/red +,- radio harness
LR Speaker +/- brown/yellow - brown/lt. blue +,- radio harness
RR Speaker +/- dk blue/orange - dk blue/white +,- radio harness

Radio 12Vorange Radio Ground black Radio Ignition pink Radio Illumination
blue/black Factory Amp Turn-on orange/black Power Antenna green
Left Front Speaker (+/-) red - blue
Right Front Speaker (+/-) white - brown
Left Rear Speaker (+/-) orange - blue
Right Rear Speaker (+/-) orange - green

This color code works for 87-93 mustang factory radio; it might work on yours as well. I'm not sure if it has the same fuses though.

Radio Connector:

Light Green / Yellow - Hot at all times (Fuse 8)
Yellow / Black - Hot in ACC or Run (Fuse 11)
Light Brown / Red - Goes to instrument panel dimming rheostat (Fuse 4)
Red - Ground
White / Purple - Hot in ACC or Run (Fuse 11)

Speaker Connector:

White / Light Green - (+) Right Instrument Panel & Door Speaker
Dark Green / Orange - (-) Right Instrument Panel & Door Speaker
Brown / Pink - (+) Right Rear Speaker
Pink / Light Brown - (-) Right Rear Speaker
Pink / Light Green - (+) Left Rear Speaker
Tan / Yellow - (-) Left Rear Speaker
Light Brown / White - (+) Left Instrument Panel & Door Speaker
Orange / Light Green - (-) Left Instrument Panel & Door Speaker
Hope this helps.

I'm not sure what year you have but this color code works for 87-93 mustangs.

Radio Connector:

Light Green / Yellow - Hot at all times (Fuse 8)
Yellow / Black - Hot in ACC or Run (Fuse 11)
Light Brown / Red - Goes to instrument panel dimming rheostat (Fuse 4)
Red - Ground
White / Purple - Hot in ACC or Run (Fuse 11)

Speaker Connector:

White / Light Green - (+) Right Instrument Panel & Door Speaker
Dark Green / Orange - (-) Right Instrument Panel & Door Speaker
Brown / Pink - (+) Right Rear Speaker
Pink / Light Brown - (-) Right Rear Speaker
Pink / Light Green - (+) Left Rear Speaker
Tan / Yellow - (-) Left Rear Speaker
Light Brown / White - (+) Left Instrument Panel & Door Speaker
Orange / Light Green - (-) Left Instrument Panel & Door Speaker
Hope this helps.

Yep!
Here you go...
1995 Mercury Villager Car Stereo Radio Wiring Diagram
Radio Constant 12V+ Wire: Green/Purple
Radio Ignition Switched 12V+ Wire: Yellow/Black
Radio Ground Wire: Black/Light Green
Radio Illumination Wire: Green
Radio Dimmer Wire: N/A
Radio Antenna Trigger Wire: N/A
Radio Amplifier Trigger Wire: N/A
Front Speakers Size: 5′ x 7′
Front Speakers Location: Doors
Left Front Speaker Wire (+): Orange/Light Green
Left Front Speaker Wire (-): Light Blue/White
Right Front Speaker Wire (+): White/Light Green
Right Front Speaker Wire (-): Dark Green/Orange
Rear Speakers Size: 5′ x 7′
Rear Speakers Location: Side Panels
Left Rear Speaker Wire (+): Light Brown/White
Left Rear Speaker Wire (-): Light Brown/Yellow
Right Rear Speaker Wire (+): Light Brown/Green
Right Rear Speaker Wire (-): Brown/Pink

That's what they show for factory
K

Constant 12V+ Black/Yellow
Switched 12V+ Red/White
Ground Black/Light Blue
Illumination Orange
Dimmer Pink
Antenna Trigger Orange/Red
Antenna Right Rear
Front Speakers 4" Doors
Left Front (+) Dark Green
Left Front (-) Brown/Red
Right Front (+) Purple
Right Front (-) Dark Blue/Red
Rear Speakers 6" x 9" Rear Deck
Left Rear (+) Brown/Yellow
Left Rear (-) Brown/Light Blue
Right Rear (+) Dark Blue/White
Right Rear (-) Dark Blue/Orange

glad you posted what colors you do have , cause 2 resources didn't match ,actually 3 , i did find a match to your colors was a 97 year model premium radio, so we have a match .....

black/ light green = ground
dark green = left front spkr +
purple = right front spkr +
blue/white = right rear spkr -
brown/blue = left rear spkr -
brown/yellow = left rear spkr +
blue/orange = right rear spkr +
black/yellow = park lamps
brown/red = left front spkr -
orange = dimmer signal
pink = fused battery +
green/red = radio choke relay
red/white = fused ignition
blue/red = right front spkr -

cheers

djmac62 is also an excellent answer