Oh dear what a baby . I must ask, that how common is white colour with mastines?

Yes, he/she is very cute... 'Pure white' is not common in mastines.
I do not really see him/her as 'white'... but as a 'light' coloured mastin

I thought, that colour could be cream or something, puppys ears looks darker than other coat. Same kind colouring is with CAO´s, white but with light cream marks, barely noticable. It is richness, that mastines do have such many colours, and that colours can be mixed.

Mari you are right about 'cream' that was the word I forgot to say. Maybe 'cream' and 'white' actually are quite 'similar' at least at photos