Basemap (as Google Maps 2018)

Feature HEX
Green areas #1ea362
Roads #ffe047
Water #4a89f3
Terrain #d3d3d3
Borders #dd4b3e
Parcels, buildings #822f2b

Evacuation zones

Feature HEX
A1 #d64a6d
A2 #f26d76
A3 #f29295
B #ffc187
C #fff391

Floodplain

Feature HEX
100Yr with velocity #08306b
100Yr #0057b3
500Yr #56a9e0
Levee protection #00ffff
Out #ffffff

Surge

Feature HEX
Cat. 1 #050505
Cat. 2 #2e2e2e
Cat. 3 #575757
Cat. 4 #7f7f7f
Cat. 5 #e3e3e3

Vulnerability

Feature HEX
Highest #6a51a5
High #9d9ac7
Low #cbc8df
Lowest #f1f0f8

References

On colors

On map projections

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