Don't insert a duplicate history entry when first visiting page

[tabatkins]

If you follow a link to Coloratum that specifies a valid color, Coloratum immediately adds that color to the history, creating a "duplicate" history entry. This means that you have to hit Back twice to actually return to the page that had the original link.

You should avoid adding a history entry when the parsed color came from the URL rather than manual entry.

[LeaVerou]

Confirmed.