Given the task definition and input, reply with output. Given the background description of some cooking related query, summarize the question into a title

I very rarely buy avocado, but now I happen to have two of them in my kitchen. I'm used to ripe avocado having this colour:Now, mine are more brightly green, like this:They aren't very soft, so I guess they aren't ripe yet, but I'm wondering if the colour will change or if this is just a matter of which variety of avocado it is?
Can bright green avocados be ripe?