The biggest pet peeve I have regarding clothes is color combination. You can be wearing something completely hideous, but I will give you bonus points for at least matching.
Here are my Top 3 worst color combinations (in no particular order):
1. Light Gray and Khaki (Photo taken from close friend who shall remain anonymous)
These colors blend too much. There's no defining line as to where your shirt stops and your pants begin. There's no color contrast. Frankly, it's bland. But don't get me wrong. Grey can be paired with khaki but they have to be paired with the correct shades of each.
These two shades are perfectly fine together. The darker the grey, the better. The shade of khaki shown here is a lighter shade, but I'm perfectly fine with darker shades with darker grey.
Side Note: Please do not think I am a bad friend. I have tried to convince this anonymous friend to not wear light grey and khaki for years. It worked for a few, however, old habits die hard.
2. Navy and Black (Photo from boring google search)
These shades are too similar. Again, there's no color contrast. It's boring and bland. Although I will say... that's a cute skirt.
3. Brown and Black (Photo from boring google search. However, I'm very glad I do not have friends that dress like this).
I've tried to come up with words to describe why I don't like these colors together. I feel it may be because in my mind, black and brown are on completely different ends of the color spectrum (to me, white/beige is in the middle with white on the black side and beige on the brown). They just don't mix. If you were painting and mixed these two colors together, what would you get? Grossness.
Maybe I am too OCD. Maybe I'm irked by weird things. What do you think?