How to have regression lines in a different color brewer pallete than the points in my scatter plot?

Using GapMinder data, I've made the plot below with a different regression line by continent:

Here is the code:

ggplot(gapminder_82, 
       aes(gdpPercap, lifeExp, color = continent)) + 
  geom_point() + 
  scale_x_log10() +
  scale_color_brewer(palette = "Set2") +
  geom_smooth(method = "lm", se = F)

The problem is that the lines aren't really visible. So I'd like to use 2 different color palettes from color brewer. The Pastel2 for the points, but I'd like to use "Dark2" for the lines. It would make the lines stand out.

How would I do it?

You can use a filled point shape for the points, allowing you to use a fill scale for the points and colour for the lines:

ggplot(gapminder_82, 
       aes(gdpPercap, lifeExp)) + 
    # Make the edge color for the points totally transparent
    geom_point(aes(fill = continent), shape = 21, size = 3, colour = "#FFFFFF00") + 
    scale_x_log10() +
    geom_smooth(aes(color = continent), method = "lm", se = F) +
    scale_fill_brewer(palette = "Pastel2") +
    scale_color_brewer(palette = "Dark2") + 
    theme_bw()

Result: