Pip, is grey-blue with a yellow head and tail, and whitish coloured wings with black markings on them. You can't see it very well on the picture, but Pip is a "spangle" budgerigar, which means the markings on his wings look almost like they've been reversed, normal budgies have dark (most commonly black) centers to the wing feathers with light coloured edges, Pip's wing feathers are white (with a hint of yellow) and grey/black markings round the edges (although if you look closely there is a pale border*). Strangely Pippy has one normally patterned feather.
*The reason for this pale border is because having one spangle gene stops the melanin, in the wing and throat feathers from forming in the center of the feather so it's almost as if the feather has been tye-dyed. Contsequently the pale border is there because normally patterned budgies don't have the melanin in that section of the feather, so removing colour from the centre of the feather doesn't add more colour round the edges, so it's not technically a reversed normal-pattern. (it doesnt look quite like that, but it's a similar principle, but with genetic instead of clips/string/rubber-bands)