1. I may wear bright colors in the evening.

2. I may wear bright colored clothes in the evening.

3. I may wear colthes of bright colors in the evening.

4. I may wear bright color clothes in the evening.

(Which ones are correct? Do you have some more expressions which have the same meaning?)

#s 1 and 2 are the best.

Out of the four expressions you provided, all of them are grammatically correct. However, the phrasing and word choices vary slightly. Here is an evaluation of each expression:

1. "I may wear bright colors in the evening."
This sentence is clear and concise. It accurately conveys the idea that you have the option to wear vibrant hues during the evening.

2. "I may wear bright colored clothes in the evening."
In this sentence, the phrase "bright colored clothes" is used instead of "bright colors." This version emphasizes the clothing aspect of the statement. It suggests that you may choose to wear garments with vivid shades in the evening.

3. "I may wear clothes of bright colors in the evening."
This sentence conveys the same meaning as the previous ones, but it incorporates a different phrasing. Here, the phrase "clothes of bright colors" is used instead of "bright colored clothes." This version gives a more formal tone to the sentence.

4. "I may wear bright color clothes in the evening."
This sentence closely resembles the second expression in terms of meaning. However, it uses "bright color clothes" instead of "bright colored clothes" to describe the garments. While this phrasing is still understandable, it is less common and may sound slightly awkward to some native English speakers.

In terms of meaning, all four expressions are practically equivalent. They imply that you have the option to wear clothing with vibrant colors during the evening. Some alternative phrases with the same meaning could be:

- "I might choose to wear brightly colored clothes in the evening."
- "During the evening, I may opt for clothes in vibrant shades."
- "In the evening, I have the option to wear garments with bright hues."

Feel free to choose the one that you find most suitable or adapt them to your personal style of expression.