One can create Custom Color Ramps in ArcGIS using Style Manager.
Right, but my question is: is it this color ramp, which I attached, a one of the standard ramps for slope maps or not ?
Looks like a color ramp, which has been used to symbolize Slope layer.
See the following color ramp (looks similar to yours). It is available in the list of color ramps (not a custom ramp). Red to Blue Diverging, Bright (inverted).
Thank you. This is what I wanted to know