Html in User Title

How can I use html to change the color of my words. Specifically, for user title. I wanted it to say PIXELS.
The P is red.
I is orange.
X is yellow.
E is green.
L is blue.
S is purple.
I tried to submit one but it was denied for some reason.

 

It must have been over the character limit, that is quite a bit of characters, mind pasting the code here? you can't use <span> styling either.

 

I got rid of the code. Dont really know anything about html, just used an editor online. It was 2 characters under the limit but it did use <span>