Colors

[ben-miles]

Already pretty close here, but there's a few things to tighten up:

• [x] Add any custom colors to the palette, like the two shades of blue I'm using for buttons
• [x] Make sure all buttons have the same normal and hover state colors
• [ ] Try out gradient backgrounds on the sections that are currently solid blue

[ben-miles]

Closed by these commits:

• e55087ce6739b51fba71e20398294fc2f8755391
• ba608d71c6accb3950f61251e58030fdf8377375
• a616df7ec6e57dd90eaef0769e26921245fb5640
• 6ea0f28e6695db96152afb34a798f165f34ec29c