Config for HDR?

[grahamh]

You should leave it on limited. See:

How to avoid washed-out colours - Limited and Full Range settings

If the colours of your videos look washed out, and blacks aren’t really black, you may have issues with your ‘quantisation (or quantization) range’ settings. This guide is intended to help fix some edge cases that occur with some less common display devices. If you are using a regular HD or 4K TV, you shouldn’t need to read this guide. With a regular TV issues would only occur if the setting on your OSMC device is not the default value of ‘limited range’. This setting is in Settings->System->D…

Settings level (bottom left) needs to be on Expert to see the limited/full range option.