plotting - Define a color function based on color samples obtained from ColorBrewer

I am quite new to Mathematica and I am searching for a way to create a smooth colormap based on the samples given by ColorBrewer. Is it possible to create a interpolated function from those sample points?

Answer

I enter RGB values in a matrix using Ctrl+, and Ctrl+Enter (tutorial):

{{237, 248, 177}, {127, 205, 187}, {44, 127, 184}}

Then create a color function cf:

With[{rgb = RGBColor @@@ (dat/255)},
 cf = Blend[rgb, #] &;
]

And use it:

ArrayPlot[{Range@10}, ColorFunction -> cf]

ListPlot3D[
 Table[Sin[j^2 + i], {i, 0, Pi, Pi/5}, {j, 0, Pi, Pi/5}],

 Mesh -> None,
 InterpolationOrder -> 0,
 ColorFunction -> cf
]