It’s fall. The seasons are changing, the weather is changing, the surroundings are changing, and it’s dark at 4 p.m.
With fall comes certain shades that are traditional to wear, such as: reds, oranges, browns, yellows, etc. But, and this might be an obvious statement, you should consider what colors you look best in (for example, as a pale-skinned blonde, I fully believe yellow looks atrocious on me).
Definitely play with shades in your clothing (and your makeup, if you want), and experiment with them. Try all kinds of different shades of purple, even if you don’t think they exactly fit with “fall”, because pairing those colors with a brown or a tan may make even a color like lilac feel more like an autumn outfit.
As for coats, hoodies, and sweaters, this is where I throw my advice about color to the wind and say buy what’s warmest and most comfortable, regardless of the color. If it’s a “spring” color (green, for example), but it’s very warm and very comfortable, get it, wear it. You can always wear those reds and oranges under it, and it may create an extra “pop” in the color to stand out more in the sea of brown grass and red leaves on the ground.
On the other hand, you shouldn’t let all this dictate how you dress. Wear what you feel comfortable in, wear what you think looks good.