Variables for colour in floating text (found in html)

[DonDemon]

For example to create rainbow text
Solved thanks to Endercraft

 

[Endercraft]

HTML tags.

<font color=#F00FF0>hello</font>

 

[DonDemon]

HTML tags.

<font color=#F00FF0>hello</font>

thanks, I thought it works only for size (because when I tried to add and it didn't add)