As for transparent, if set the percent to 0%, instead of transparent, it becomes totally while.
So I'm afraid transparent might not be possible.
Secondly, quick filters of one worksheet share the same format setting.
While quick filters of different worksheets can have their individual setting.
As a result, as long as your three quick filters belong to the same worksheet "Sheet2",
it's impossible to assign different colors for them three.
But there's workaround (somewhat silly workaround).
Please check out the attache workbook.
Transparent Quick Filters.twbx 13.0 KB
And nicely explained Lei Chen.