`geo_color` is not rendering the color green

User report: If you set the value of "geo_color" to "green", a warning is thrown in the console

> Could not parse color from value '#fac33'

And the color in the geospatial display is set as black. The geo_color property works in general, with values like "red", "black", and "blue" all appropriately setting the geospatial display.
