Thanks Frontend Mentor for allowing to build on this project.
I would like to know if anyone else used the chart.js library to create their bar chart. If yes, then were you able to remove the y-axis outline (grey). I managed to remove the grid in the background by using gridLines: { display: false}. However, I couldn't find any information in the documentation about that one grey outline.
Thanks and I welcome any other feedback after having looked at my code.