Using Dynamic Content for CSS-Classes / Hidding elements

Hello,

I am using custom layout for a certain post type and want to hide a section, based on a meta-value of the corresponding post.
As i see adding adding dynamic content to css-class ord ID-Field does not work (just the name of the variable i used is inserted)
Is there any known way to achieve a behaviour to add a meta value as css-class to an element (in my case color section)?

thanks!