| darken_palette | R Documentation | 
Update a ggthemr palette so that colours are darker by some specified amount. This includes everything (background, axes lines, swatch colours, gradient etc.).
darken_palette(amount)
amount | 
 value between 0 and 1 indicating by how much the colours should be darker/lighter.  | 
Ciaran Tobin
ggthemr('dust')
darken_palette(0.2)
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