Function to generate new color palettes by interpolation.
interpolate2(palette, color, degree, number)a vector of colors to be interpolated
color (hex-code) to be mixed with the colors in the 'palette'.
degree of interpolation, range: 1 (slight interpolation) - 7 (strong interpolation).
number of colors to be generated.
#interpolate the 'zhblue'-palette with black and generate 7 new ones
interpolate2(palette = zhpal$zhblue, color = c("#000000"), degree = 3,
number = 7)
#> [1] "#2A526A" "#2A5B78" "#2A6587" "#3F708C" "#537A92" "#6A8698" "#7F929E"