*Steps to reproduce:*
# Open any VFX Graph.
# Hover over the icons in the top bar.
# On the top Right of the VFX Graph window, click the ▼ icon.
# Hover over the blue links.
# Repeat all steps in the opposite editor theme. (i.e. dark/light mode).

{*}Actual results:{*}{*}{*}

In both light mode and dark mode:
* In Step 3: Icons will _either_ turn blue on hover, _or_ slightly change it's shade of grey.
* In Step 5: Blue link hover is difficult to read and does not span the whole dropdown.

In light mode:
* Dark blue on dark grey icons and text have noticeably poor contrast.

*Expected results:* 
* Unless there is a justification otherwise, hover colour behaviour should be the same for all icons.
* Hovered UI elements should have enough contrast to remain easily readable.
* Links hovered should have the hover background span the width of the dropdown.

*Reproducible with versions:* 6000.1.0b1, 6000.0.34f1, 2022.3.56f1, 2022.2.0f1

*Tested on (OS):* Windows 10, Mac Sequoia 15.1.1