Google images could be used to generate a random grayscale background image from the top 100 results. Keyword search background image, large size, white or black colors.
Alternative
Randomly cycle through 20 hardcoded grayscale hero images (or just have one hero), and use an icon API as the second API
ColourLovers Doesn't Work Due to CORS
Potential Fix
Google images could be used to generate a random grayscale background image from the top 100 results. Keyword search background image, large size, white or black colors.
Alternative
Randomly cycle through 20 hardcoded grayscale hero images (or just have one hero), and use an icon API as the second API