That particluar page is made using CSS to format the cell colour changes.
If you want to delve into it, post again to that effect and let me know the software you normally use for creating your webs.
Best phone camera 2017
Stunning new film posters by Hattie Stewart, Joe Cruz & more
iPad Pro 10.5in (2017) review
28 astuces pour profiter au mieux de votre iPhone