That's because your tags aren't closed.
When you create a COLOR tag, you have to close it with [/color].
Next to the FONT, SIZE, and COLOR tags there is an underlined bit called "Close all Tags."
Click it ! And you'll close a tag.
Here, I'll show you an example:
[ COLOR=purple ]Insert text[ / COLOR ]
Delete the spaces in the tags and try again.
It should work ! The same method applies for using different fonts, sizes, ect. as well. :furawatchi: