Here are some of the training videos and resource guides that can be used for creating / modifying webpages on hssus.org website.
Given below are the color Theme details while desiging the webpages:
Title Font Color: #8f8f8f
Regular Font color: #191b1d
font-family: 'Raleway', sans-serif;
And tabs theme and everything, can be referred by existing pages like: https://www.hssus.org/boudhik