This extends our color palette to give us a broader set of colors we can

use on the page for light mode.
When the original color palette was created, we only had the colors we

needed at the time, leaving gaps in the palette. As time went on, some

new colors were added to fill that in, but it left some of the color

gradients a bit inconsistent.
Now, each color type has been filled with a consistent gradient of

colors. This required minimal adjustment, except to a red color usage.
Some new color categories have been created: Cool Grey, Mustard

(replacing the old Brown), a new Brown, and Cyan.
Most of these are not used, but the styling update for 6.0 will be

making use of some of these new definitions.

Tested the styles that used the affected constants. Verified that,

while there are color differences when you pixel-peep, they still

look the same in context and don't appear to have any visual issues.