Most inexpensive Chromebooks come with average or subpar displays in order to keep costs low. The IdeaPad Duet 5 manages to include an AMOLED panel for superior colors and black levels while maintaining a competitive price.
https://www.notebookcheck.net/Lenovo-IdeaPad-Duet-5-Chromebook-review-OLED-is-now-super-affordable.591430.0.html