A cynic might be tempted to say that there are two categories of photographer, those who admit they have problems matching colour, and liars. Matching colour ought to be simple, according to the ads, yet it rarely seems to be.
The problem is not you, the problem is that colour is astonishingly complex
I have two modes of taking pictures: point-and-shoot and perfectionist. In the first mode I use a pocket-sized camera with no manual controls. It processes the pictures, I throw them onto my hard drive, and the only editing I'll ever do is remove some occasional red-eye