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CPK Colors

The black background in the Element and Color Name columns corresponds to the "standard" background color in RasMol. Note that the rendering of the hexadecimal-equivalent colors shown here will depend on your browser, monitor type and settings, etc. Thus, they only approximate how RasMol will render the RGB colors on your computer.
Except for green, white, blue, and orange, these color names are not the ones specified as "Predefined Colors" in RasMol; thus, they can only be specified on the command line as RGB triplets.
In addition to the twelve elements listed above, RasMol colors many of the other elements in a distinctive way. The complete RasMol CPK coloring scheme can be viewed using the Chime plug-in to display a portion of the Periodic Table of Elements.

For X-ray crystallographic models of proteins and nucleic acids (i.e. without hydrogens) the display can be 'brightened' by converting the O, C, and N atoms from the RasMol default cpk colors to "true red, white and blue" using RasMol's predefined color scheme. Use the following script, "usa.col", or sequence of commands to try it:

     select all
     select oxygen
     color red
     select carbon
     color white
     select nitrogen
     color blue
     select all

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