Functions are meant to return values. Functions are NOT meant to make changes to a database.
You might be trying to create a Stored Procedure. Understanding the difference between both...

You could try to use the functions presented in the following article:
http://www.sqlservercentral.com/scripts/String+Function/141686/

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Last night, something weird happened in my dream.
I saw some advertisement for SQL consulting services charging $8USD per non-clustered index. I'm still trying to determine if the bad...

This might give you an idea on how to control the values a little bit more.

WITH
E(n) AS(
  SELECT n FROM (VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0))E(n)
),
E2(n)...

What about creating a huge script with all the views' definitions and use replace functionality of the text/code editor (SSMS?) to change the values?
This can also be done using...

What about adding a column to the table to add a flag. Then update the flag whenever needed and use that column in your views instead of the Term column.

The main problem I can see is that there's no guarantee that you'll have humanly distinctive colors for each user.
If you get #EE1010 and #EE1012, it would be really...