lightroom adding colors in develop tab

Just follow the instructions here: https://community.adobe.com/t5/lightroom-classic-discussions/lightroom-classic-set-defaults-for-raw-file-import/td-p/10925693

Pretty sure there are camera matching profiles available fo this camera.

This is (really) what your raw data looks like:

Your camera builds a proprietary JPEG for you to view on the LCD and that preview is embedded into the raw. You initially see this one version of a proprietary rendering of the above, then LR has to build its own version based on how you set up LR to preview your data. You should never expect the proprietary raw to JPEG conversion in the camera to match anything else. It might get 'close' visually with a camera matching profile or it may not. But the point is, the preview you first see, the preview on the camera is simply one interpretation of the above raw data and every product that builds or renders this, does this differently. It is proprietary to that product. 

RAW images first appear in Lightroom Classic from the JPG preview embedded in the file. A few seconds later, after Lightroom Classic has had the time to render the actual RAW image, the appearance changes to the rendering of the RAW. The embedded JPG preview and rendered RAW will very often look different.

This is normal behavior for Lightroom Classic and cannot be turned off.