I am using QGIS 2.12 on a Macbook Pro running OS X 10.10.5.
I have an interesting DEM for the California coast (which I downloaded from Santa Barbara, CA 1/3 arc-second MHW DEM.
I've been playing with color ramps for this. How can I get the colors to change smoothly yet still break from blues to greens exactly at sea level (elevation zero)?
The only way I have succeeded in getting a precise break at the shoreline (sea level) is to have discrete color changes. But that does not look good at all in areas away from the shoreline.