Colour idioms

It´s very difficult for art theives to sell paintings, even on the _________ market.

In the speaking, I made up a story about going to France, it was a ______ lie.

I have some old paintings from my grandfather. They´re big, they take up space and I can´t sell them. They are ________ elephants.

It´s complicated, it´s not a ______ and ______ issue.

This is a ______ area, it´s not completely legal but it is not prohibitted.

He killer sent the police a letter, but it was a ______ herring, designed to fool them.

The painting turned up out of the ________, and surprisingly was completely genuine.

We tried to organise a tour but there was so much ___ tape and paperwork that we gave up.