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Brighten up a specified color (e.g., the swarm color in apa_beeplot()). This function is not exported.
apa_beeplot()
brighten(col, factor)
A character vector as returned by rgb().
rgb()
Colour to be brightened up. Can be anything that is digestible by col2rgb().
col2rgb()
Numeric. The rate with which the color channel should be boosted. Must be in the range between 0 and 1.