Standard Theme Colors, Excel 2010 (They really can't be edited?!)

I want to edit the standard "Theme Colors" that appear when you right click a cell to change font color, or on a tab to change the tab color.

I know you can create a custom theme, but that isn't helpful because once I forward my spreadsheets other users view them with Excel 2010's default "Built-in" "Office" theme.


Any suggestions?

^ You're right, romper. Apparently someone was changing the theme back to standard somewhere along path of the email.

Thanks!