To customise Job Blocks even more, you can add unique background images to every Job Block.
Adding a background image to a job block
In the Live Editor - on your career page or in a job post - hover on one of the Job Blocks that you’ve added
Click the Appearance icon, the second icon in the options
Hit Background
Click Image
Then, click Select image
Upload an image
The image is added now as a background image
Use the color picker to overlay the background image with a color. You’re in control of the opacity of the color overlay by dragging the slider (all the way to the left is no color overlay)