In QGIS 3.0, handling of color ramps has gotten much better via a newly introduced color ramp button widget. Improvements include: - custom color ramp settings are remembered when projects are re-opened - color ramp inversion is implemented within the widget, enabling this action across QGIS - quick access to "favorite" color ramps within the widget pop-up menu - interfacing with catalogs (cpt-city and ColorBrewer) is now much more pleasant
This feature was developed by Mathieu Pellerin