I am honestly sick of looking at orange all the time. It will be great if the developers take this consideration into development. I am 67% sure that there are more people who want a possibility to change the colors, and maybe the positions of the UI.
Sincerely: A guy who likes colors, but despises orange.
You can, it's just not in the in-game GUI... you set it in your graphics file. Mine is green (oculus user). I also hate the orange... there is already too much orange everywhere else in the game.
Eventually they will/should include a way to do it in-game.
Chillax, dude. Your request has come up a number of times. There is a hack for changing HUD colours to some extent, with even some small applications written to tell you what values to punch in the config file to get a desired colour. Meanwhile Frontier has been changing how the HUD is rendered so you get accurately coloured light reflections on the dash regardless of the HUD colour. This is one step towards customisable HUD colours in the graphic settings in the future.
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Basically, it is coming. Meanwhile there is a simple hack.
Copy the everything from <GraphicsConfig> to </GraphicsConfig> in your GraphicsConfiguration.xml file into the override file then update the section that arkku gives you with your new colours.
The game reads the original file then reads the override file afterwards , so your colours never get changed , even after a patch.
This is my GraphicsConfigurationOverride.xml so you can see what lines need to be stored in it , mines set to light blue and white.