How I can obtain white colour for background brightness?

I have it orange:

 

But I want it white:

 

 

Thanks in advance.

How I can obtain white colour for background brightness?

A guess. See page 55 of the Introduction Manual MCP Type item. I think Collins is white and Honeywell is orange.

I know already this. But you don't understand what I want to tell.

 

See the two above pictures and see the difference. These are two Collins...

 

Look the brightness of panel. The first is orange and the second is white.

The top screenshot looked like a Honeywell to me. Sorry. Like I said, it was just a guess.

I know already this. But you don't understand what I want to tell.

 

See the two above pictures and see the difference. These are two Collins...

 

Look the brightness of panel. The first is orange and the second is white.

How did your NGX lighting get that orange in the first place? The orange in the first image doesn't look like the lighting in the PMDG NGX, which is much more like the colour of the second image. It's possible to customise the colours so maybe your system got corrupted in some way. You could reinstall the NGX to put it back to the correct state.

The top screenshot looked like a Honeywell to me. Sorry. Like I said, it was just a guess.

The MCP doesn't change the entire lighting scheme, just the colour of the MCP LCD lighting.

I don't know why you have orange originally. Some people modify a certain file to get those colors, but it comes "out-of-the-box" with white lights...

 

 

The MCP doesn't change the entire lighting scheme, just the colour of the MCP LCD lighting.

I just noticed that the numbers in the MCP are white while the switch descriptions are orange. Also the PFD, ND, and EICAS look okay. if the plane works correctly it's a one off. Could be a collectors item.   

Looks like the colors.ini file got messed up, or changed.

Have you by any chance use one of the Cockpit Color mods? I've seen a lot of people using the mods, 

Thanks to all for numerous answers. Can anyone update to me the file "737NGX_Colors.ini" located in "D:\......\Microsoft Games\Microsoft Flight Simulator X\PMDG\PMDG 737 NGX" ?

Thanks to all for numerous answers. Can anyone update to me the file "737NGX_Colors.ini" located in "D:\......\Microsoft Games\Microsoft Flight Simulator X\PMDG\PMDG 737 NGX" ?

PM me your e-mail address and I will attempt to get the file to you via Dropbox.

thanks you! You have a PM B)

I've received the file. Now my NGX lights are white.

Many thanks!