| color_sum | R Documentation | 
Mix two colors additively in RGB space
color_sum(col1, col2)
col1 | 
 A hex or R color  | 
col2 | 
 Another hex or R color  | 
The sum of col1 and col2 as a character hex color (e.g. "#FFFFFF")
color_sum("red","green")
color_sum("#1B9E77","#D95F02")
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