Hypixel SkyBlock Wiki:Page Styles

.test { color: red; } Page Styles are a custom JS feature that allows for embedding of CSS into a page via pageStyles classed elements. Be aware it has several limitations due to security risks, the following CSS features are disabled:
 * @font-face
 * url
 * expression
 * @import

Example
When the following code is present in a page, elements of class test will be colored red. For example, this element will be affected.