The following quote defines the hierarchy of Perspective styles since the stylesheet was added:
First, make sure you don't have any named styles or inline style properties defined on the component that might be overriding it.
Then I would recommend browsing through the elements of the rendered page in a local session (either Ctrl+Shift+I and navigate to the docked view OR right click on the page and select Inspect from the context menu)
It should look similar to this depending on your browser, but you should be able to see the style rules being applied to the element you have selected at the bottom and any rules being overwritten should be struck through with a line.
If you can share what you find is overwriting your rules it would be easier to solve the problem.