Can bright green avocados be ripe?
Most avocado's are the Hass variety, which will go very dark when ripe

It look like you have bought a Reed or maybe Gwen variety. They are perfectly fine. Their skin colour will not significantly change as they ripen, so to check, gently squeeze near the point, and if it is soft it is ripe. If not a few days by the window at room temperature will fix it