The identifier for this property is the URL of this page, https://wiki.ivoa.net/twiki/bin/view/IVOA/MyCustomProperty20210611.

This property contains a set of names of colours, formatted as a JSON list.

For example:

    {
    red,
    green,
    blue
    }

The list can be formatted with or without newlines or spaces between the elements.

    {red, green, blue}

    {red,green,blue}

The list may include duplicates

    {red, green, green}

The list may not include blank values

    {red, , green}

The list may use the word null to represent a blank or null value

    {red, null, green}