As JT05 has said - focus on texture and also lighting. Cable knit throws and cushions, faux fur throws, sheepskin rugs or footstool. 'Giant' knit throws and cushions are popular just now and are very plush and cosy.
Make sure you have side lamps and use a 'warm white' reasonably low watt bulb. Ideally have lampshades that are dark cream or even tobacco colored inside (casts a lovely light)
Use candles or led battery candles and warm scents like orange and cinnamon.
Natural wood and copper or rose gold accessories will warm up a pale blue. We have a light greeny grey with grey and cream walls, and I have used different tones of gold, brass, copper accessories and we have wooden furniture. It feels very cosy at night but fresh in the day.