Mine are white, red, blue, yellow, and grey.
White is the helmet, bracers, antenna, back of the glove, belly armour, belt, bottom of the codpeice, thigh armour and greaves,
Red are the helmet lens housing, flat portion of the shield, lower half of the breastplate, top half of the codpeice, and the hoof sections of the feet.
Blue is the upper breastplate.
Yellow is the helmet lens, Fire Caste insignia on the shield, and gyro on the pulse weapon.
Grey is the backpack, majority of the rifle, and cloth.
Also known as Gundam Prototype Colours, or Gundam Parade Colours. Combat colours are typically blue and white or bone, as per the Nu, Alex, GP, etc, etc... It's just that most series start with the protagonist hijacking a prototype.