These notes are pretty much the same steps as the two extensions list, it's just that I had to collate them together because neither seems to list it fully in the proper order.
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Install Synthwave ’84/Synthwave + Fluoromachine theme on VS Code (I used the Fluoromachine one)
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Install Custom CSS and JS Loader
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Command + Shift + P to open command palette > "Preferences: Open settings (JSON)"