I prefer your doors in white, they look seamless and streamlined. Black makes them stand out. I don’t think the terracotta goes with the carpet - is there a reason you’ve painted it that colour?

I agree with Betty the terracotta too bright and too contrast for the current grey carpet unless you go for 80s midcentury interior style

If you like warm colour wall for contemporer or modern interior that can harmonize with grey carpet I would suggest using terracota clay paint color by behr Marque

https://share.google/KE5asxgfUSKSWstpq

https://share.google/bQWT74wdlx9EF23Ie

I advise to keep both the hallway wall as the same color but if you want the curved wall as accent wall better use vertical tiles in muted terra cotta or grey color (you can search tile curved wall for reference) Its not shiny tile as the bathroom but more natural stone tile that could make the hallway feels more high end and if you can combine them with LED indirect lights on the ceiling plus add tall vase or learn tall plant on the curved wall space add it with small spotlight it Will enhance the space evenmore

https://share.google/MADgB4a9eViVwDXbL

https://share.google/aKY9WzOL41cUqR8mq

https://share.google/vYLXsz0M8F1XIaRq1

For the build in cupboard I advise to make the door the same color as the wall to make it less cramped

Access door that leads to livingroom, kitchen, etc Will be painted in different color than the wall (white/grey/wood,etc)

If you want to paint the hallway with other color than white I would suggest using limewash texture

I like the curved terracotta wall and prefer the white doors.

Thanks Sarah appreciate the feedback