Rick -re your comment - Why not allow someone to use a graphic that is being used to describe a course? Then these graphics would really become meaningful. You can- that is the main point of the course images. If you have a course graphic then it appears. You only get the patterns if you don't have a course description graphic. See
I had this same question-I did some screenshots and measurements of the banners and got about 600x150 for the banners. If one were to make their own, it would need to roughly be this dimension- I don't know about adding text or anything and it being centered or not.I wanted to assign the same color to the same type of course in our setting (4 same courses across 5 cohort levels). This can be easier to say "click to the purple one" instead of name since our students are also EFL students. Below, these aren't randomly generated-rather I made banner images out of the randomly generated designs in a test installation and assigned them as course photos this way until/if the color picker gets added .
Does anyone have tried a 433x150px image?
I just found that it works fine because de maximum width is 433px and the height is fixed at 150px.
That way, the courseimage would be cut, -the box is resized due to the responsive design- and the text, if so, would not be distorted.