Problem with Teal UI

Yesterday I was teaching a "Files from Folder" operation in Power Query / Power BI. The command needed was "Combine and Transform" which is available from a drop-down arrow on the "Combine" button. This drop-down arrow is almost impossible to see, as it is a grey of a very similar shade to the teal button. This stood out well on the old yellow UI, but it just blends into the teal, especially as the colours darken on hover. I'm sure this isn't the only place where this problem occurs. You really need your designers to check the UI experience carefully. I appreciate that the teal colour was introduced for the 10% of the population with colour vision differences, but a large proportion of the other 90% don't have 20/20 vision, or may not be working in a brightly lit environment.