unikn default color palette (11 colors).
pal_unikn combines the 5 blue colors 
from color palette pal_seeblau 
with the 6 non-blue colors of pal_unikn 
to a palette containing 11 color values.
pal_unikn
An object of class data.frame with 1 rows and 11 columns.
Adding seeblau5 (i.e., pal_seeblau[1]) to 
the default color palette pal_unikn 
also puts white at the central (middle) 
position of a palette with 11 values:
pal_unikn[[6]] is white or "#FFFFFF".  
This is useful when creating color gradients.
pal_unikn for the default uni.kn color palette; 
pal_seeblau for the uni.kn seeblau color palette; 
seecol to show color palettes;
usecol to use color palettes.
Other color palettes: 
pal_bordeaux,
pal_grau,
pal_karpfenblau,
pal_peach,
pal_petrol,
pal_pinky,
pal_seeblau,
pal_seegruen,
pal_signal,
pal_unikn_dark,
pal_unikn_light,
pal_unikn_pair,
pal_unikn_ppt,
pal_unikn_pref,
pal_unikn_web
pal_unikn dim(pal_unikn) # 1 11 # Access by position: pal_unikn[1] # new color "seeblau5" (as df) pal_unikn[[1]] # new color value "#008ECE" # Access by name: pal_unikn["seeblau5"] # new color "seeblau5" (as df) pal_unikn[["seeblau5"]] # new color value "#008ECE" # Plotting palette: seecol(pal_unikn) # Note: pal_unikn[6] # "white" or "#FFFFFF" as central of 11 colors
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