Hard to say, i voted amber because being a VERY white car it makes the front end distinguishable and theres just something i like about the look, after all you have red/orange/white lights on the back so IMO clear indicators are lost unless you are changing all the lights.
But on the flip side of the coin - if you fit clears they should be the completely clear ones as above, they look shit with orange filters showing through like egg yolks