I darkened the default Texture. Two options one with without the red portions (1.0a) and one with the red portions intact (Red).


New Red Variant
Version 1.0a - Fixed compression, file is now same size as Vanilla texture, no loss in fidelity.
Installation
Extract the folder in the archive to the Data folder in the game directory (Steam\SteamApps\common\Fallout 4\Data)
Navigate to My Documents/My Games/Fallout4
Open the file Fallout4.ini
Locate the value
sResourceDataDirsFinal=STRINGS\,
And change its value to
sResourceDataDirsFinal=STRINGS\, TEXTURES\
Save the changes
Right click the file and set it to be Read Only.
Uninstall
Remove the files
PAFrame01_d.dds
PAFrame01SMALL_d.dds
PAHandHD01_d.dds
From the folder Fallout 4\Data\Textures\actors\powerarmor


New Red Variant
Version 1.0a - Fixed compression, file is now same size as Vanilla texture, no loss in fidelity.
Installation
Extract the folder in the archive to the Data folder in the game directory (Steam\SteamApps\common\Fallout 4\Data)
Navigate to My Documents/My Games/Fallout4
Open the file Fallout4.ini
Locate the value
sResourceDataDirsFinal=STRINGS\,
And change its value to
sResourceDataDirsFinal=STRINGS\, TEXTURES\
Save the changes
Right click the file and set it to be Read Only.
Uninstall
Remove the files
PAFrame01_d.dds
PAFrame01SMALL_d.dds
PAHandHD01_d.dds
From the folder Fallout 4\Data\Textures\actors\powerarmor