Only Cobalt has color?

[twilsonco]

color is missing for everything but Cobalt

Attempting to use PeriodicTable to color scatter points in a plot from imported computational chemistry charge density grid data, I noticed that all colors returned an empty string.

Looking into it, color is only set for Cobalt:

Workaround and proposed solution

As a workaround, I'm using the following list of hex rgb colors (that I got from https://sciencenotes.org/molecule-atom-colors-cpk-colors/) that can be used when plotting.

Conceptually, the color field should IMO return the conventional color used to represent the element. This list of colors should be used to set the color of each element, since the colors are missing from https://github.com/Bowserinator/Periodic-Table-JSON/blob/master/PeriodicTableJSON.json

I'd be happy to PR this.

atom_colors = ("#FFFFFF","#D9FFFF","#CC80FF","#C2FF00","#FFB5B5","#909090","#3050F8",
               "#FF0D0D","#90E050","#B3E3F5","#AB5CF2","#8AFF00","#BFA6A6","#F0C8A0",
               "#FF8000","#FFFF30","#1FF01F","#80D1E3","#8F40D4","#3DFF00","#E6E6E6",
               "#BFC2C7","#A6A6AB","#8A99C7","#9C7AC7","#E06633","#F090A0","#50D050",
               "#C88033","#7D80B0","#C28F8F","#668F8F","#BD80E3","#FFA100","#A62929",
               "#5CB8D1","#702EB0","#00FF00","#94FFFF","#94E0E0","#73C2C9","#54B5B5",
               "#3B9E9E","#248F8F","#0A7D8C","#006985","#C0C0C0","#FFD98F","#A67573",
               "#668080","#9E63B5","#D47A00","#940094","#429EB0","#57178F","#00C900",
               "#70D4FF","#FFFFC7","#D9FFC7","#C7FFC7","#A3FFC7","#8FFFC7","#61FFC7",
               "#45FFC7","#30FFC7","#1FFFC7","#00FF9C","#00E675","#00D452","#00BF38",
               "#00AB24","#4DC2FF","#4DA6FF","#2194D6","#267DAB","#266696","#175487",
               "#D0D0E0","#FFD123","#B8B8D0","#A6544D","#575961","#9E4FB5","#AB5C00",
               "#754F45","#428296","#420066","#007D00","#70ABFA","#00BAFF","#00A1FF",
               "#008FFF","#0080FF","#006BFF","#545CF2","#785CE3","#8A4FE3","#A136D4",
               "#B31FD4","#B31FBA","#B30DA6","#BD0D87","#C70066","#CC0059","#D1004F",
               "#D90045","#E00038","#E6002E","#EB0026","#FF00A0","#FF00A0","#FF00A0",
               "#FF00A0","#FF00A0","#FF00A0","#FF00A0","#FF00A0","#FF00A0")

Partial demonstration of workaround

In my case this looks like this:

atoms = [Dict("data" => elements[atom_num], 
                  "color" => atom_colors[atom_num],
                  "r" => atom_xyz)

then

r = invert([a["r"] for a in sys["atoms"]])
plot(scatter(x=r[1], y=r[2], z=r[3], 
                mode="markers", type="scatter3d", legend=false,
                marker=attr(color=[a["color"] for a in sys["atoms"]]), 
                line=attr(color="black", width=3))
                )

[twilsonco]

I'm an idiot. The field for the representative color isn't color, it's cpk_hex and is populated correctly for all elements.