Accessiblity Audit

[afogel]

Is your feature request related to a problem? Please describe.
Currently, we are split between two different themes. As @JoshDevHub has pointed out, the Accessibility of our current theme is quite poor. This may seem simply aesthetic, but better universal design can improve everyone's experience of the services we provide, in small and large ways alike.

Describe the solution you'd like
I think we should take time do establish a design guide that:

1. defines the color guide for a light theme (still using daisy's primary, secondary, etc. variables)
2. defines the color guide for a dark theme (that could look like how the landing page currently looks now)
3. defines a spacing guide (spacing segments often shouldn't happen linearly, but instead should grow exponentially)

Additional context
I think this suggestion may require a rethinking of the existing brand colors, as the current primary green is quite bright, which can make finding good complementary colors more challenging.