I could tell you that it is red..... but I cant prove it as I didnt see any leaks or drips on my garage floor... I did notice some wetness on the front of the tranny when I was under there.... so my leak was in the early stage....

clear or yellow..... hmmmmmm... do you have a cat? YUK!

Oil leaking from the valve covers would be black just like any other dirty oil....

Light color oil might be power steering fluid or yellow brake fluid.... that's all I got man....