It looks good. Some minor suggestions:
The animation on the dropdowns makes the UI appear sluggish. It might not be noticeable to an average user, but even microsecond delays can be frustrating for fast users, because it makes it look like slow processing is making the UI go out of sync with user actions. Also, the menu dropdown timing is not aligned with the hover change under the mouse. I think that UI animation is not a good idea in general, unless it clarifies something that would not otherwise be clear. In this case, it makes things a bit more confusing.
Edit: playing around with the dropdowns makes me feel like I’m seeing double. The new dropdown appears before the old one fades away. It will probably be even more frustrating for users on slow devices. I would show/hide the dropdowns immediately, with no animation or delays, just like the hover effect directly under the mouse.
High contrast (along with yellow stripes) says “danger”. Since many people who land on the site are probably dealing with anxiety (bugs), it might be better to have the design fade into the background more.
Maybe try a dark gray for the text rather than black. The white text on a black background requires squinting. A blue (like #21527E from the header) might work.