I made this for myself, but thought some of you might like it. Just a repainted Hud.dds with the Retro and Prograde markers Red, Dock marker Blue, and Alignment windows are Yellow. Only available when the Green Hud is selected. This is derivative work of the original Hud.dds included with Orbiter.
UPDATE: Made the Vector Arrows red, and the Heading Bug also. I felt they needed to stand out from the green.
UPDATE 2016: now affects all four huds. The things that are important are colored differently from the grid.
UPDATE 2018:Â Subtle changes to color, Plus, Added Power indicators for the glass cockpit.
Tested with Orbiter 2016, i don't see any reason that it shouldn't work in previous versions.
Unzip to Orbiter folder, Let it overwrite. I've Included a zip with the original files.
Appreciate comments and ratings, thanks!