CPK Colours

The RasMol cpk colour scheme is based upon the colours of the popular plastic spacefilling models which were developed by Corey, Pauling and later improved by Kultun. This colour scheme colour `atom' objects by the atom (element) type. This is the scheme conventionally used by chemists. The assignment of element type to colours is given below.

    Carbon       light grey       Chlorine         green
    Oxygen       red              Bromine, Zinc    brown
    Hydogen      white            Sodium           blue
    Nitrogen     light blue       Iron             purple
    Sulphur      yellow           Calcium, Metals  dark grey
    Phosphorous  orange           Unknown          deep pink