The Correct Preposition for the Sentence

The correct preposition to use in the given sentence is "painted with."

Explanation

When describing the application of paint to an object or surface, the preposition "with" is commonly used. In this case, we are referring to the action of applying blue color to the wall, so the appropriate preposition is "painted with."

Using "by" or "from" in this context would not accurately convey the intended meaning. Let's understand why:

1. Painted with: When we say "painted with," it implies that someone used blue color as the medium to paint the wall. The focus is on the tool or material used for painting.

2. Painted by: This preposition is used to indicate the person or entity responsible for painting. However, it does not convey the specific color used. For example, "The wall was painted by John" indicates that John was the painter, but it doesn't mention the color.

3. Painted from: Using "painted from" might suggest that the wall was created using blue color as a source material, which is not the intended meaning. This preposition is more commonly used when describing the composition or origin of an object, such as "a painting made from acrylics."

Therefore, "painted with" accurately conveys the action of applying blue color to the wall. It focuses on the material used for painting, indicating that the wall is now covered in blue paint.

Summary

In summary, the correct preposition to use in the given sentence is "painted with." This preposition accurately describes the action of applying blue color to the wall, highlighting the material or tool used. Using "by" or "from" would not convey the same meaning in this context.