Continuous fill scale that aligns with the Urban Institute style
1 2 3 4 5  | scale_colour_gradientn(..., colours = c("#CFE8F3", "#A2D4EC", "#73BFE2",
  "#46ABDB", "#1696D2", "#12719E", "#0A4C6A", "#062635"),
  colors = c("#CFE8F3", "#A2D4EC", "#73BFE2", "#46ABDB", "#1696D2",
  "#12719E", "#0A4C6A", "#062635"), values = NULL, space = "Lab",
  na.value = "grey50", guide = "colourbar")
 | 
... | 
 other arguments passed to   | 
colours | 
 vector of colours  | 
colors | 
 vector of colours  | 
values | 
 if colours should not be evenly positioned along the gradient this vector gives the position (between 0 and 1) for each colour in the colours vector. See rescale for a convience function to map an arbitrary range to between 0 and 1  | 
space | 
 colour space in which to calculate gradient. Must be "Lab" - other values are deprecated.  | 
na.value | 
 default color for NA values  | 
guide | 
 legend representation of scale  | 
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