Excellent, that has removed the gradient; thank you very much! I had to comment out some old CSS that was interfering with what you wrote, but now the pages https://www.susanlittle.com/gallery-watercolour/ and https://www.susanlittle.com/gallery-acrylic/ look much better.
I changed the text color in the same css block so it would be black.
Now I only have weirdness with the positioning of the captions. You can see on https://www.susanlittle.com/gallery-watercolour/ that each caption is a variable distance from the bottom of the image of each painting. Can you see why that is? I’d prefer to have captions always appear the same distance from the bottom of each image.
Also, the white text and gradients are still appearing on the https://www.susanlittle.com/miniature-original-watercolour-paintings/ page. Did I do something to override things on that page?
Again, thank you very much for your help with this.