It's not the "color" that's the issue (although that was part of it).
It's that there is so much of it. I liked how M7 blinkfeed looked.
Turns out, it's just the way the new version works. There seems no rhyme or reason of when it decides to use Text on top of Solid Background vs Text on top of the image.
All I can think of is the M7 version used to Crop the image to get it to fit the aspect ratio of the box it's in. Now it keeps the image and fills it with a solid color.
I thought it had something to do with images being too busy to put the text on top of. But there seems no pattern with that.
But I finally did change the Theme to Grey/Black and the solid blocks are not as ugly.
I still prefer how M7 blinkfeed looked. Which had no solid background in the boxes. Text was always on top of images (granted not always readable but was 95% of the time).
But the M8 version when it decides to put text on top of images is no better than M7. So it makes little sense and seems random.