Bethesda uses a palette system to color the different Combat Armor material mods - which makes it REALLY simple to swap one material's colors for another.

You want to use the Polymer material, but don't want dingy white armor? I got you covered. Change the Polymer colors to Shadowed (or a special, darker version of Shadowed), Brotherhood of Steel, Military, or the base color of unmodded Combat Armor.

Want to use Shadowed for the sneak bonus, but want a variety of colors? Change it to Darker Shadowed, BoS, Military, Desaturated (black and gray) or base unmodded. 

Want to use Brotherhood of Steel material for the resistances, but don't particularly care for the tan and orange colors? Change it to Shadowed, Darker Shadowed, Unmodded, Desaturated, or Military.

Have a suggestion for a swap on the other colors? Let me know, I can whip it right up!

Installation:

There are a couple of steps you have to do in order to have ANY mods work.

Copied and Pasted directly from the Wiki: http://wiki.tesnexus.com/index.php/Fallout_4_Mod_Installation

"How to enable modding

Navigate to your Fallout 4 Folder at the following location "Documents/My Games/Fallout 4"
Within this folder will be a number of .ini files, highlight "Fallout4Prefs.ini" and "Fallout4.ini".
Right Click, select Properties and ensure that these are NOT marked as read only.

Open Fallout4Prefs.ini with your favourite text editor (we use Notepad++).
Navigate to the very bottom and you will see the line [Launcher]. Directly underneath this, copy the following text:
bEnableFileSelection=1
Save and Close

Open Fallout4.ini with your favourite text editor.
Find the line that reads: sResourceDataDirsFinal=STRINGS\
Replace this with the following text:
sResourceDataDirsFinal=STRINGS\, TEXTURES\, MUSIC\, SOUND\, INTERFACE\, MESHES\, PROGRAMS\, MATERIALS\, LODSETTINGS\, VIS\, MISC\, SCRIPTS\, SHADERSFX\
Save and close...

You're ready to get modding :)"

You can also, INSTEAD OF modifying sResourceDataDirsFinal=STRINGS\ to add all the other stuff, you can simply paste 
bInvalidateOlderFiles=1
at the bottom of the [Archive] section. (This is what I have done.)

Just download your flavor of swap (only one, as they each replace the same file) and install with NMM. If you have a request to change 2 or more (say, you want Polymer changed to Military, and Brotherhood of Steel swapped to Shadowed) let me know that, too. I can crank these out pretty fast.


Also used in the screenshots: Distressed Minutemen Logo for Combat Armor, which replaces the generic Star decal for the Minutemen logo, and Vaultsuit BoS Uniform and Pipboy Recolor for the OD green BoS Uniform.