Judging colours from photos is fraught with danger as they appear different on different devices. And choosing whites is not easy. However I’ve just gone through white selections in my renovation and have warm greys in the house. I narrowed down to Casper White Quarter or Lexicon Quarter. Both will work with warm grey. Sounds like Casper for you as you already like it!

Photo's would be super handy , but as a general rule I wouldn't do skirtings and doors in a similar tone to your walls . Unless you are a kindergarten , you wouldn't do red doors and yellow skirtings with blue walls , but my attitude is that anything that adds to a room along your desired theme is good ! I take it your doors are plain -- even in rental properties of mine , I have changed plain flat doors to ones with 3 or 4 panels , and painted them stark white against painted or wallpapered walls . Half a dozen doors like that are around $1000 , a solid timber front door in a similar style $400-500 -- suddenly , the tenants think I am looking after them ( generally it's done between tenancies , but you know what I mean ) . If it's your own place , even moreso .

Yeah I know what you mean... I have to paint it anyway as it needs repainting and the colour that is there has a pink undertone which really bothers me. not a pink person at all... So you would suggest just staying with an antique white or something and just adding all my colour with accessories?

Disclaimer -- I hate grey with a vengance . So i may be biased . But if you scroll up , and get the 'luxury planking' at the top of your screen , and the Perfect Boredom at the bottom ( the heading thing cuts through the middle ) it looks horrible IMO . In the middle photo , the darker timber and the white actually makes the grey almost acceptible as a base , but look at the other pics , and even the floor is looking as grey as a corpse with all the colour washed out .