Here's why:
* Adjectives describe nouns. "Blue" is describing the color of the "umbrella."
* In this case, "blue" is functioning as part of the noun phrase. It's not modifying another noun in a sentence.
To find adjectives, you'd need a sentence that uses "blue umbrella" as part of it. For example:
* The bright blue umbrella stood out in the crowd. (Here, "bright" and "blue" are adjectives describing "umbrella.")
Let me know if you'd like to try finding adjectives in a different sentence! 😊