Make Food Access Map more accessible

[maxachis]

Things like increasing visibility and contrast for people with Red-Green color blindness, or other visual impairments.

[maxachis]

This can be used for estimating contrast
https://webaim.org/resources/contrastchecker/

[mike-feeney]

I used the Bang Wong color pallet from this article Coloring for Colorblindness in combination with the contrast checker to modify the colors of the service tags on the results pane.